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'''[!] Server maintenance'''
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The pgpool.net server will be shut down for maintenance work
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from 04:00 JST (UTC+0900) to 21:00 JST (UTC+0900), Sat, 16 November 2019.
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= Welcome to Pgpool Wiki! =
 
= Welcome to Pgpool Wiki! =
  
== What is pgpool-II? ==
+
== What is Pgpool-II? ==
  
pgpool-II is a middleware that works between PostgreSQL servers and a PostgreSQL database client. It is licensed under BSD license. It provides the following features.
+
Pgpool-II is a middleware that works between PostgreSQL servers and a PostgreSQL database client. It is licensed under BSD license. It provides the following features.
  
 
* '''Connection Pooling'''
 
* '''Connection Pooling'''
: pgpool-II saves connections to the PostgreSQL servers, and reuse them whenever a new connection with the same properties (i.e. username, database, protocol version) comes in. It reduces connection overhead, and improves system's overall throughput.
+
: Pgpool-II saves connections to the PostgreSQL servers, and reuse them whenever a new connection with the same properties (i.e. username, database, protocol version) comes in. It reduces connection overhead, and improves system's overall throughput.
  
 
* '''Replication'''
 
* '''Replication'''
: pgpool-II can manage multiple PostgreSQL servers. Using the replication function enables creating a realtime backup on 2 or more physical disks, so that the service can continue without stopping servers in case of a disk failure.
+
: Pgpool-II can manage multiple PostgreSQL servers. Using the replication function enables creating a realtime backup on 2 or more physical disks, so that the service can continue without stopping servers in case of a disk failure.
  
* '''Load Balance'''
+
* '''Load Balancing'''
: If a database is replicated, executing a SELECT query on any server will return the same result. pgpool-II takes an advantage of the replication feature to reduce the load on each PostgreSQL server by distributing SELECT queries among multiple servers, improving system's overall throughput. At best, performance improves proportionally to the number of PostgreSQL servers. Load balance works best in a situation where there are a lot of users executing many queries at the same time.
+
: If a database is replicated, executing a SELECT query on any server will return the same result. Pgpool-II takes an advantage of the replication feature to reduce the load on each PostgreSQL server by distributing SELECT queries among multiple servers, improving system's overall throughput. At best, performance improves proportionally to the number of PostgreSQL servers. Load balance works best in a situation where there are a lot of users executing many queries at the same time.
  
 
* '''Limiting Exceeding Connections'''
 
* '''Limiting Exceeding Connections'''
 
: There is a limit on the maximum number of concurrent connections with PostgreSQL, and connections are rejected after this many connections. Setting the maximum number of connections, however, increases resource consumption and affect system performance. pgpool-II also has a limit on the maximum number of connections, but extra connections will be queued instead of returning an error immediately.
 
: There is a limit on the maximum number of concurrent connections with PostgreSQL, and connections are rejected after this many connections. Setting the maximum number of connections, however, increases resource consumption and affect system performance. pgpool-II also has a limit on the maximum number of connections, but extra connections will be queued instead of returning an error immediately.
  
* '''Parallel Query'''
+
* '''Watchdog'''
: Using the parallel query function, data can be divided among the multiple servers, so that a query can be executed on all the servers concurrently to reduce the overall execution time. Parallel query works the best when searching large-scale data.
+
: Watchdog can coordinate multiple Pgpool-II, create a robust cluster system and avoid the single point of failure or split brain. Watchdog can perform lifecheck against other pgpool-II nodes, to detect a fault of Pgpoll-II. If active Pgpool-II goes down, standby Pgpool-II can be promoted to active, and take over Virtual IP.
 +
 
 +
* '''In Memory Query Cache'''
 +
: In memory query cache allows to save a pair of SELECT statement and its result. If an identical SELECTs comes in, Pgpool-II returns the value from cache. Since no SQL parsing nor access to PostgreSQL are involved, using in memory cache is extremely fast. On the other hand, it might be slower than the normal path in some cases, because it adds some overhead of storing cache data.
 +
 
 +
Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used with Pgpool-II almost without a
 +
 
 +
Pgpool-II talks PostgreSQL's backend and frontend protocol, and relays a connection between them. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used with Pgpool-II almost without a change to its sources.
 +
 
 +
== Pgpool-II License ==
 +
 
 +
See [http://pgpool.net/mediawiki/index.php/pgpool-II_License License].
 +
 
 +
== Stable versions ==
 +
 
 +
* Pgpool-II: 4.0, 3.7, 3.6, 3.5, 3.4
 +
* pgpoolAdmin: 4.0, 3.7, 3.6, 3.5, 3.4
 +
 
 +
== Contacts ==
 +
 
 +
* If you have technical questions regarding Pgpool-II, please subscribe [http://pgpool.net/mediawiki/index.php/Mailing_lists Pgpool-II mailing lists] and send questions to it (pgpool-general will be a starter). Please '''do not''' send technical questions via private email. We will not respond such that messages.
 +
 
 +
* If you believe that you found a vulnerability/security issues with Pgpool-II, please send a '''private email''' to ishii at sraoss.co.jp (he is the project leader).
 +
 
 +
= What's new =
 +
 
 +
== News ==
 +
 
 +
=== Pgpool-II 4.1.4, 4.0.11, 3.7.16, 3.6.23 and 3.5.27 officially released (2020/09/17) ===
 +
 
 +
Pgpool-II 4.1.4, 4.0.11, 3.7.16, 3.6.23 and 3.5.27 officially released
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.1.4 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-4.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-4.html Japanese]
 +
* 4.0.11 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-11.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-11.html Japanese]
 +
* 3.7.16 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-16.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-16.html Japanese]
 +
* 3.6.23 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-23.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-23.html Japanese]
 +
* 3.5.27 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-27.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-27.html Japanese]
 +
 
 +
== Events ==
 +
=== PGConf.ASIA 2019 in Bali ===
 +
 
 +
Bo Peng is going to give a presentation [https://www.sraoss.co.jp/event_seminar/2019/PGConf.ASIA.Bali.2019-PENG.pdf Setup a High-Availability and Load Balancing PostgreSQL Cluster: New Features of Pgpool-II 4.1] at [https://2019.pgconf.asia/ "PGConf.ASIA 2019"] held in Bali from September 8th to 11st.
 +
 
 +
=== PGConf.ASIA 2018 in Tokyo ===
 +
 
 +
Tatsuo Ishii and Bo Peng are going to give a presentation
 +
[http://www.pgpool.net/download.php?f=pgpool-past-now-and-future.pdf Celebrating its 15th Anniversary Pgpool-II Past Present and Future]
 +
[http://www.pgpool.net/download.php?f=pgpool-past-now-and-future-part2.pdf Celebrating its 15th Anniversary Pgpool-II Past Present and Future part2] at [http://www.pgconf.asia/EN/2018/day1/#B4 "PGConf.ASIA 2018"] held in Tokyo from December 10th to 12th.
 +
 
 +
=== PGConf.ASIA 2017 in Tokyo ===
 +
 
 +
Tatsuo Ishii is going to give a presentation  [http://www.pgconf.asia/EN/2017/day-2/#B5 "More reliability and support for PostgreSQL 10: Introducing Pgpool-II 3.7"] at [http://www.pgconf.asia/EN/2017/ "PGConf.ASIA 2017"], held in Tokyo from December 4th to 6th.
 +
 
 +
=== PostgreSQL Conference in Russia 2016 ===
 +
 
 +
Tatsuo gave a talk "How to manage a herd of elephants" at [https://pgconf.ru/en "PostgreSQL Conference in Russia 2016"], held in Moscow from February 4th to 5th.
 +
The slides are available in [http://pgpool.net/mediawiki/index.php/Documentation#Developer.27s_documentation Developer's documentation].
 +
 
 +
=== PostgreSQL Conference in China 2015 ===
 +
 
 +
Tatsuo gave a talk "How to manage a herd of elephants" at [http://www.eventdove.com/event/106042 "PostgreSQL Conference in China 2015"], held in Beijing from November 21th to 22th.
 +
The slides are available in [http://pgpool.net/mediawiki/index.php/Documentation#Developer.27s_documentation Developer's documentation].
 +
 
 +
=== pgCon 2015 Cluster Hacker Summit ===
 +
 
 +
We participated "6th Postgres Cluster Hacker Summit" which was held as a part of PgCon 2015 Developer Unconference. We reported about Development Status Updates and pgpool-II 3.5 features. The slides are available in [http://pgpool.net/mediawiki/index.php/Documentation#Developer.27s_documentation Developer's documentation].
 +
 
 +
=== Pgpool-II Day 2015 in Tokyo ===
 +
 
 +
We had the very first time pgpool-II decicated conference. See the [http://pgpool.net/mediawiki/index.php/pgpool-II_Day_2015 event report].
 +
 
 +
== New docs ==
 +
 
 +
=== pgpool-II 3.5 is coming soon! ===
 +
 
 +
pgpool-II 3.5 alpha1 has been out. Tatsuo introduces [http://pgpool.net/mediawiki/index.php?title=pgpool-II_3.5_features&redirect=no "new features of pgpool-II 3.5."]
 +
 
 +
== Stable ==
 +
 
 +
=== Pgpool-II 4.1.4, 4.0.11, 3.7.16, 3.6.23 and 3.5.27 officially released (2020/09/17) ===
 +
 
 +
Pgpool-II 4.1.4, 4.0.11, 3.7.16, 3.6.23 and 3.5.27 officially released
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.1.4 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-4.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-4.html Japanese]
 +
* 4.0.11 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-11.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-11.html Japanese]
 +
* 3.7.16 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-16.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-16.html Japanese]
 +
* 3.6.23 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-23.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-23.html Japanese]
 +
* 3.5.27 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-27.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-27.html Japanese]
 +
 
 +
=== Pgpool-II 4.1.3, 4.0.10, 3.7.15, 3.6.22 and 3.5.26 officially released (2020/08/20) ===
 +
 
 +
Pgpool-II 4.1.3, 4.0.10, 3.7.15, 3.6.22 and 3.5.26 officially released
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.1.3 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-3.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-3.html Japanese]
 +
* 4.0.10 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-10.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-10.html Japanese]
 +
* 3.7.15 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-15.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-15.html Japanese]
 +
* 3.6.22 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-22.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-22.html Japanese]
 +
* 3.5.26 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-26.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-26.html Japanese]
 +
 
 +
=== Pgpool-II 4.1.2, 4.0.9, 3.7.14, 3.6.21 and 3.5.25 officially released (2020/05/21) ===
 +
 
 +
Pgpool-II 4.1.2, 4.0.9, 3.7.14, 3.6.21 and 3.5.25 officially released
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.1.2 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-2.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-2.html Japanese]
 +
* 4.0.9 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-9.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-9.html Japanese]
 +
* 3.7.14 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-14.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-14.html Japanese]
 +
* 3.6.21 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-21.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-21.html Japanese]
 +
* 3.5.25 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-25.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-25.html Japanese]
 +
 
 +
=== Pgpool-II 4.1.1, 4.0.8, 3.7.13, 3.6.20, 3.5.24 and pgpoolAdmin 4.1.0 officially released (2020/02/20) ===
 +
 
 +
Pgpool-II 4.1.1, 4.0.8, 3.7.13, 3.6.20, 3.5.24 and pgpoolAdmin 4.1.0 officially released
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.1.1 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-1.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-1.html Japanese]
 +
* 4.0.8 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-8.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-8.html Japanese]
 +
* 3.7.13 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-13.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-13.html Japanese]
 +
* 3.6.20 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-20.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-20.html Japanese]
 +
* 3.5.24 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-24.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-24.html Japanese]
 +
 
 +
=== Pgpool-II 4.1.0, 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 RPMs Update 2 officially released (2019/11/19) ===
 +
 
 +
Pgpool-II 4.1.0, 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 RPMs Update 2 are officially released.
 +
The updated RPM packages fixed the bug which logs are not output, when log_destination = 'syslog' is configured.
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
=== Pgpool-II 4.1.0 released (2019/10/31) ===
 +
 
 +
Pgpool-II 4.1.0 is now relased.
 +
 
 +
Major enhancements in Pgpool-II 4.1 include:
 +
 
 +
* Statement level load balancing.
 +
* Auto failback.
 +
* Enhance performance in number of areas.
 +
** Shared relation cache allows to reuse relation cache among sessions to reduce internal queries against PostgreSQL system catalogs.
 +
** Have separate SQL parser for DML statements to eliminate unnecessary parsing effort.
 +
** Load balancing control for specific queries.
 +
* Reduce Internal Queries against System Catalogs.
 +
* Import PostgreSQL 12 SQL parser.
 +
* etc.
 +
 
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
Release notes:
 +
[https://www.pgpool.net/docs/latest/en/html/ English]
 +
[https://www.pgpool.net/docs/latest/ja/html/ Japanese]
 +
 
 +
=== Pgpool-II 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 officially released (2019/10/31) ===
 +
 
 +
Pgpool-II 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 officially released
 +
 
 +
Please note that 3.4.26 is the last release of 3.4 series
 +
because 5 years has passed since 3.4 was out (2014/11).
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.0.7 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-6.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-6.html Japanese]
 +
* 3.7.12 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-11.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-11.html Japanese]
 +
* 3.6.19 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-18.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-18.html Japanese]
 +
* 3.5.23 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-22.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-22.html Japanese]
 +
* 3.4.26:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-25.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-25.html Japanese]
 +
 
 +
=== Pgpool-II 4.0.6, 3.7.11, 3.6.18, 3.5.22 and 3.4.25 officially released (2019/08/15) ===
 +
 
 +
Pgpool-II 4.0.6, 3.7.11, 3.6.18, 3.5.22 and 3.4.25 officially released
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.0.6 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-6.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-6.html Japanese]
 +
* 3.7.11 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-11.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-11.html Japanese]
 +
* 3.6.18 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-18.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-18.html Japanese]
 +
* 3.5.22 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-22.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-22.html Japanese]
 +
* 3.4.25:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-25.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-25.html Japanese]
 +
 
 +
=== Pgpool-II 4.0.5, 3.7.10, 3.6.17, 3.5.21 and 3.4.24 officially released (2019/05/16) ===
 +
 
 +
Pgpool-II 4.0.5, 3.7.10, 3.6.17, 3.5.21 and 3.4.24 officially released
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.0.5 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-5.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-5.html Japanese]
 +
* 3.7.10 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-10.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-10.html Japanese]
 +
* 3.6.17 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-17.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-17.html Japanese]
 +
* 3.5.21 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-21.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-21.html Japanese]
 +
* 3.4.24:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-24.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-24.html Japanese]
 +
 
 +
=== Pgpool-II 4.0.4, 3.7.9, 3.6.16, 3.5.20 and 3.4.23 officially released (2019/03/29) ===
 +
 
 +
Pgpool-II 4.0.4, 3.7.9, 3.6.16, 3.5.20 and 3.4.23 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.0.4 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-4.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-4.html Japanese]
 +
* 3.7.9 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-9.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-9.html Japanese]
 +
* 3.6.16 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-16.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-16.html Japanese]
 +
* 3.5.20 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-20.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-20.html Japanese]
 +
* 3.4.23:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-23.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-23.html Japanese]
 +
 
 +
=== Pgpool-II 4.0.3, 3.7.8, 3.6.15, 3.5.19 and 3.4.22 officially released (2019/02/21) ===
 +
 
 +
Pgpool-II 4.0.3, 3.7.8, 3.6.15, 3.5.19 and 3.4.22 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.0.3 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-3.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-3.html Japanese]
 +
* 3.7.8 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-8.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-8.html Japanese]
 +
* 3.6.15 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-15.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-15.html Japanese]
 +
* 3.5.19 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-19.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-19.html Japanese]
 +
* 3.4.22:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-22.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-22.html Japanese]
 +
 
 +
=== pgpoolAdmin 4.0.1 officially released (2018/12/20) ===
 +
 
 +
PgPool Global Development Group has released a Security Update of pgpoolAdmin.
 +
 
 +
The purpose of this release is to address CVE-2018-16203, which
 +
allow an attacker to login without properly checking the authorization.
 +
Once getting into gpoolAdmin, the attacker can control Pgpool-II.
 +
Also it may be possible to obtain the superuser role of a PostgreSQL database.
 +
 
 +
This vulnability affects all versions of pgpoolAdmin. We recommend
 +
upgrade pgpoolAdmin to 4.0.1 immediately (remember that PgpoolAdmin
 +
4.0.1 is compatible with Pgpool-II 3.4 or later).
 +
 
 +
PgPool Global Development Group would like to thank Fotios Rogkotis
 +
of DarkMatter for finding the security issue and giving us the  
 +
detailed studies on it.
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
=== Pgpool-II 4.0.2, 3.7.7, 3.6.14, 3.5.18 and 3.4.21 officially released (2018/11/22) ===
 +
 
 +
Pgpool-II 4.0.2, 3.7.7, 3.6.14, 3.5.18 and 3.4.21 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.0.2 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-2.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-2.html Japanese]
 +
* 3.7.7 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-7.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-7.html Japanese]
 +
* 3.6.14 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-14.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-14.html Japanese]
 +
* 3.5.18 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-18.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-18.html Japanese]
 +
* 3.4.21:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-21.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-21.html Japanese]
 +
 
 +
=== Pgpool-II 4.0.1, 3.7.6, 3.6.13, 3.5.17 and 3.4.20 officially released (2018/10/31) ===
 +
 
 +
Pgpool-II 4.0.1, 3.7.6, 3.6.13, 3.5.17 and 3.4.20 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.0.1 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-1.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-1.html Japanese]
 +
* 3.7.6 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-6.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-6.html Japanese]
 +
* 3.6.13 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-13.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-13.html Japanese]
 +
* 3.5.17 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-17.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-17.html Japanese]
 +
* 3.4.20:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-20.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-20.html Japanese]
 +
 
 +
=== Pgpool-II 4.0.0 and pgpoolAdmin 4.0.0 officially released (2018/10/19) ===
 +
 
 +
Pgpool-II 4.0.0 and pgpoolAdmin 4.0.0 are now relased.
 +
 
 +
V4.0 has new features:
 +
 
 +
* Add SCRAM and Certificate authentication support.
 +
* Detecting "false" primary server of PostgreSQL.
 +
* Improvements to load balancing:
 +
** More load balancing fine control after write queries.
 +
** Load balancing control for specific queries.
 +
** Allow to specify load balance weight ratio for load balance parameters.
 +
* Add last state change timestamp to SHOW POOL NODES.
 +
* Import PostgreSQL 11 SQL parser.
 +
* Logging client messages.
 +
* etc.
 +
 
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
Release notes:
 +
[https://www.pgpool.net/docs/latest/en/html/release-4-0.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0.html Japanese]
 +
 
 +
=== Pgpool-II 3.7.5, 3.6.12, 3.5.16, 3.4.19 and 3.3.22 officially released (2018/07/31) ===
 +
 
 +
Pgpool-II 3.7.5, 3.6.12, 3.5.16, 3.4.19 and 3.3.22 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.7.5 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-5.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-5.html Japanese]
 +
* 3.6.12 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-12.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-12.html Japanese]
 +
* 3.5.16 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-16.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-16.html Japanese]
 +
* 3.4.19:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-19.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-19.html Japanese]
 +
* 3.3.22:  [https://www.pgpool.net/docs/latest/en/html/release-3-3-22.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-3-22.html Japanese]
 +
 
 +
Please note that 3.3.22 is the last release of 3.3 series because 5 years has passed since 3.3 was out (2013/07/30).
 +
 
 +
=== Pgpool-II 3.7.4, 3.6.11, 3.5.15 and 3.4.18 officially released (2018/06/12) ===
 +
 
 +
Pgpool-II 3.7.4, 3.6.11, 3.5.15 and 3.4.18 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.7.4 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-4.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-4.html Japanese]
 +
* 3.6.11 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-11.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-11.html Japanese]
 +
* 3.5.15 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-15.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-15.html Japanese]
 +
* 3.4.18:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-18.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-18.html Japanese]
 +
 
 +
=== Pgpool-II 3.7.3, 3.6.10, 3.5.14, 3.4.17 and 3.3.21 officially released (2018/04/17) ===
 +
 
 +
Pgpool-II 3.7.3, 3.6.10, 3.5.14, 3.4.17 and 3.3.21 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.7.3 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-3.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-3.html Japanese]
 +
* 3.6.10 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-10.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-10.html Japanese]
 +
* 3.5.14 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-14.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-14.html Japanese]
 +
* 3.4.17:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-17.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-17.html Japanese]
 +
* 3.3.21:  [https://www.pgpool.net/docs/latest/en/html/release-3-3-21.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-3-21.html Japanese]
 +
 
 +
=== Pgpool-II 3.7.2-2 RPMs are released. (2018/03/14) ===
 +
 
 +
Pgpool-II 3.7.2-2 RPMs are released.
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
=== Pgpool-II 3.7.2, 3.6.9, 3.5.13, 3.4.16 and 3.3.20 officially released (2018/02/13) ===
 +
 
 +
Pgpool-II 3.7.2, 3.6.9, 3.5.13, 3.4.16 and 3.3.20 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.7.2 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-2.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-2.html Japanese]
 +
* 3.6.9 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-9.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-9.html Japanese]
 +
* 3.5.13 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-13.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-13.html Japanese]
 +
* 3.4.16:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-16.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-16.html Japanese]
 +
* 3.3.20:  [https://www.pgpool.net/docs/latest/en/html/release-3-3-20.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-3-20.html Japanese]
 +
 
 +
=== pgpoolAdmin 3.7.1 officially released (2018/02/05) ===
 +
 
 +
pgpoolAdmin 3.7.1 is officially released.
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
[http://www.pgpool.net/docs/pgpoolAdmin/NEWS Release notes]
 +
 
 +
=== Pgpool-II 3.7.1, 3.6.8, 3.5.12, 3.4.15 and 3.3.19 officially released (2018/01/09) ===
 +
 
 +
Pgpool-II 3.7.1, 3.6.8, 3.5.12, 3.4.15 and 3.3.19 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.7.1 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-1.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-1.html Japanese]
 +
* 3.6.8 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-8.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-8.html Japanese]
 +
* 3.5.12 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-12.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-12.html Japanese]
 +
* 3.4.15:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-15.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-15.html Japanese]
 +
* 3.3.19:  [https://www.pgpool.net/docs/latest/en/html/release-3-3-19.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-3-19.html Japanese]
 +
 
 +
=== Pgpool-II 3.7.0 and pgpoolAdmin 3.7.0 officially released (2017/11/22) ===
 +
 
 +
Pgpool-II 3.7.0 and pgpoolAdmin 3.7.0 are now relased.
 +
 
 +
V3.7 has new features:
 +
* Quorum aware failover feature.
 +
* Allow specifying the hostnames in pool_hba.
 +
* Allow to specify per node health check parameters.
 +
* Support AWS Aurora.
 +
* Import PostgreSQL 10 SQL parser.
 +
* Support logical replication.
 +
* etc.
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
Release notes:
 +
[https://www.pgpool.net/docs/latest/en/html/release-3-7.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-7.html Japanese]
 +
 
 +
=== Pgpool-II 3.6.7, 3.5.11, 3.4.14 and 3.3.18 officially released (2017/11/01) ===
 +
 
 +
Pgpool-II 3.6.7, 3.5.11, 3.4.14 and 3.3.18 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.6.7 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-7.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-7.html Japanese]
 +
* 3.5.11 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-11.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-11.html Japanese]
 +
* 3.4.14:  [https://www.pgpool.net/docs/latest/en/html/release-3-4-14.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-4-14.html Japanese]
 +
* 3.3.18:  [https://www.pgpool.net/docs/latest/en/html/release-3-3-18.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-3-18.html Japanese]
 +
 
 +
=== Pgpool-II 3.6.6, 3.5.10, 3.4.13, 3.3.17 and 3.2.22 officially released (2017/09/05) ===
 +
 
 +
Pgpool-II 3.6.6, 3.5.10, 3.4.13, 3.3.17, 3.2.22 and pgpoolAdmin 3.6.2 officially released
  
pgpool-II talks PostgreSQL's backend and frontend protocol, and relays a connection between them. Therefore, a database application (frontend) thinks that pgpool-II is the actual PostgreSQL server, and the server (backend) sees pgpool-II as one of its clients. Because pgpool-II is transparent to both the server and the client, an existing database application can be used with pgpool-II almost without a change to its sources.
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
== pgpool-II License ==
+
* 3.6.6 :  [http://www.pgpool.net/docs/latest/en/html/release-3-6-6.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-6-6.html Japanese]
 +
* 3.5.10 :  [http://www.pgpool.net/docs/latest/en/html/release-3-5-10.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-5-10.html Japanese]
 +
* 3.4.13:  [http://www.pgpool.net/docs/latest/en/html/release-3-4-13.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-4-13.html Japanese]
 +
* 3.3.17:  [http://www.pgpool.net/docs/latest/en/html/release-3-3-17.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-3-17.html Japanese]
 +
* 3.2.22:  [http://www.pgpool.net/docs/latest/en/html/release-3-2-22.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-2-22.html Japanese]
  
Copyright (c) 2003-2013  PgPool Global Development Group
+
=== Pgpool-II 3.6.5, 3.5.9, 3.4.12, 3.3.16 and 3.2.21 officially released (2017/07/11) ===
  
Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of the author not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. The author makes no representations about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty.
+
Pgpool-II 3.6.5, 3.5.9, 3.4.12, 3.3.16 and 3.2.21 officially released
  
= pgpool-II 3.2 =
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
  
Pgpool-II 3.2 is the latest stable version released in Aug 2012.
+
* 3.6.5 :  [http://www.pgpool.net/docs/latest/en/html/release-3-6-5.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-6-5.html Japanese]
 +
* 3.5.9 :  [http://www.pgpool.net/docs/latest/en/html/release-3-5-9.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-5-9.html Japanese]
 +
* 3.4.12:  [http://www.pgpool.net/docs/latest/en/html/release-3-4-12.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-4-12.html Japanese]
 +
* 3.3.16:  [http://www.pgpool.net/docs/latest/en/html/release-3-3-16.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-3-16.html Japanese]
 +
* 3.2.21:  [http://www.pgpool.net/docs/latest/en/html/release-3-2-21.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-2-21.html Japanese]
  
== On Memory Query Cache ==
+
=== Pgpool-II 3.6.4, 3.5.8 officially released (2017/05/11) ===
  
* '''New fast query cache !'''
+
Pgpool-II 3.6.4, 3.5.8 officially released
: On memory query cache is faster because cache storage is on memory. Moreover you don't need to restart pgpool-II when the cache is outdated because the underlying table gets updated.
+
 
: On memory cache saves pair of SELECT statements (with its Bind parameters if the SELECT is an extended query). If the same SELECTs comes in, it returns the value from cache. Since no SQL parsing nor access to PostgreSQL are involed, it's extremely fast.
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.6.4:  [http://www.pgpool.net/docs/latest/en/html/release-3-6-4.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-6-4.html Japanese]
 +
* 3.5.8:  [http://www.pgpool.net/docs/latest/en/html/release-3-5-8.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-5-8.html Japanese]
 +
 
 +
=== Pgpool-II 3.6.3, 3.5.7, 3.4.11, 3.3.15, 3.2.20 and pgpoolAdmin 3.6.1 officially released (2017/04/28) ===
 +
 
 +
Pgpool-II 3.6.3, 3.5.7, 3.4.11, 3.3.15, 3.2.20 and pgpoolAdmin 3.6.1 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.6.3:  [http://www.pgpool.net/docs/latest/en/html/release-3-6-3.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-6-3.html Japanese]
 +
* 3.5.7:  [http://www.pgpool.net/docs/latest/en/html/release-3-5-7.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-5-7.html Japanese]
 +
* 3.4.11:  [http://www.pgpool.net/docs/latest/en/html/release-3-4-11.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-4-11.html Japanese]
 +
* 3.3.15:  [http://www.pgpool.net/docs/latest/ja/html/release-3-3-15.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-3-15.html Japanese]
 +
* 3.2.20:  [http://www.pgpool.net/docs/latest/ja/html/release-3-2-20.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-2-20.html Japanese]
 +
 
 +
=== Pgpool-II 3.6.2, 3.5.6, 3.4.10, 3.3.14 and 3.2.19 officially released (2017/03/17) ===
 +
 
 +
Pgpool-II 3.6.2, 3.5.6, 3.4.10, 3.3.14 and 3.2.19 officially released
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
  
* '''Choosing cache storage'''
+
* 3.6.2:  [http://www.pgpool.net/docs/latest/en/html/release-3-6-2.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-6-2.html Japanese]
: You can choose a cache storage: shared memory or memcached (you can't use the both).
+
* 3.5.6:  [http://www.pgpool.net/docs/latest/en/html/release-3-5-6.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-5-6.html Japanese]
: Query cache with shared memory is fast and easy because you don't have to install and config memcached, but restricted the max size of cache by the one of shared memory. Query cache with memcached needs a overhead to access network, but you can set the size as you like.
+
* 3.4.10:  [http://www.pgpool.net/docs/latest/en/html/release-3-4-10.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-4-10.html Japanese]
 +
* 3.3.14:  [http://www.pgpool.net/docs/latest/ja/html/release-3-3-14.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-3-14.html Japanese]
 +
* 3.2.19:  [http://www.pgpool.net/docs/latest/ja/html/release-3-2-19.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-2-19.html Japanese]
  
== Watchdog ==
+
=== pgpoolAdmin 3.6.0 officially released (2017/02/28) ===
  
"Watchdog" is a sub process of pgpool-II aiming for adding high availability feature to it. Features added by watchdog include:
+
pgpoolAdmin 3.6.0 is officially released.
  
* '''Life checking of pgpool service'''
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
: Watchdog monitors responses of pgpool service rather than process. It sends queries to PostgreSQL via pgpool which is being monitored by watchdog and watchdog checks the response.
 
: Also watchdog monitors connections to up stream servers (application servers etc.) from the pgpool.
 
: The connection between the up stream servers and the pgpool is monitored as service of pgpool.
 
  
* '''Mutually monitoring of watchdog processes'''
+
=== pgpool-II 3.6.1, 3.5.5, 3.4.9, 3.3.13, 3.2.18 and 3.1.21 officially released (2016/12/26) ===
: Watchdog processes exchange information on the monitored servers to keep the information up to date, and to allow watchdog processes to mutually monitor each other.
 
  
* '''Changing active/standby state in case of certain faults detected'''
+
These are the latest stable versions of each major branches.  
: When a fault is detected in the pgpool service, watchdog notifies the other watchdogs of it. Watchdogs decide the new active pgpool if previous active pgpool is broken by voting and change active/standby state.
 
  
* '''Automatic virtual IP address assigning synchronous to server switching'''
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
: When a standby pgpool server promotes to active, the new active server brings up virtual IP interface. Meanwhile, the previous active server brings down the virtual IP interface.
 
: This enables the active pgpool to work using the same IP address even when servers is switched over.
 
  
* '''Automatic registration of a server as standby in recovery'''
+
* 3.6.1:  [http://www.pgpool.net/docs/latest/en/html/release-3-6-1.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-6-1.html Japanese]
: When broken server recovers or new server is attached, the watchdog process notifies the other watchdog process along with information of the new server, and the watchdog process receives information on the active server and other servers. Then, the attached server is registered as standby.
+
* 3.5.5:  [http://www.pgpool.net/docs/latest/en/html/release-3-5-5.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-5-5.html Japanese]
 +
* 3.4.9: [http://www.pgpool.net/docs/latest/en/html/release-3-4-9.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-4-9.html Japanese]
 +
* 3.3.13:  [http://www.pgpool.net/docs/latest/en/html/release-3-3-13.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-3-13.html Japanese]
 +
* 3.2.18:  [http://www.pgpool.net/docs/latest/en/html/release-3-2-18.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-2-18.html Japanese]
 +
* 3.1.21:  [http://www.pgpool.net/docs/latest/en/html/release-3-1-21.html English] [http://www.pgpool.net/docs/latest/ja/html/release-3-1-21.html Japanese]
  
= What's new (Stable) =
+
pgpool-II 3.1.21 is the final release of the 3.1.x. This series has reached "End of Life", and is no longer maintained and does not receive any updates.
  
== pgpool-II 3.2.4, 3.1.7, 3.0.11 officially released (2013/04/26) ==
+
=== pgpool-II 3.6.0 officially released (2016/11/21) ===
  
Theese are the latest stable versions of each major branches.  
+
Pgpool-II 3.6.0 is now officially released.
  
 
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
  
Learn more about pgpool-II 3.2.4:
+
V3.6's new features are:
  
* [http://www.pgpool.net/docs/pgpool-II-3.2.4/NEWS.txt pgpool-II 3.2.4 release note(English)]
+
* Improve the behavior of fail-over.
* [http://www.pgpool.net/docs/pgpool-II-3.2.4/pgpool-ja.html#release3.2.4 pgpool-II 3.2.4 release note(Japanese)]
+
* New PGPOOL SET command has been introduced.
 +
* Watchdog is significantly enhanced.
 +
* Handling of extended query protocol (e.g. used by Java applications) in streaming replication mode speeds up if many rows are returned in a result set.
 +
* Import parser of PostgreSQL 9.6.
 +
* In some cases pg_terminate_backend() now does not trigger a fail-over.
 +
* Change documentation format from raw HTML to SGML.
 +
* etc.
  
Learn more about pgpool-II 3.1.7:
+
=== pgpool-II 3.5.4, 3.4.8, 3.3.12, 3.2.17 and 3.1.20 officially released (2016/08/31) ===
  
* [http://www.pgpool.net/docs/pgpool-II-3.1.7/NEWS.txt pgpool-II 3.1.7 release note(English)]
+
These are the latest stable versions of each major branches.  
* [http://www.pgpool.net/docs/pgpool-II-3.1.7/pgpool-ja.html#release3.1.7 pgpool-II 3.1.7 release note(Japanese)]
 
  
Learn more about pgpool-II 3.0.11:
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
  
* [http://www.pgpool.net/docs/pgpool-II-3.0.11/NEWS.txt pgpool-II 3.0.11 release note(English)]
+
* 3.5.4:  [http://www.pgpool.net/docs/pgpool-II-3.5.4/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.5.4/doc/pgpool-ja.html#release3.5.4 Japanese]
* [http://www.pgpool.net/docs/pgpool-II-3.0.11/pgpool-ja.html#release pgpool-II 3.0.11 release note(Japanese)]
+
* 3.4.8:  [http://www.pgpool.net/docs/pgpool-II-3.4.8/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.4.8/doc/pgpool-ja.html#release3.4.8 Japanese]
 +
* 3.3.12:  [http://www.pgpool.net/docs/pgpool-II-3.3.12/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.3.12/doc/pgpool-ja.html#release3.3.12 Japanese]
 +
* 3.2.17:  [http://www.pgpool.net/docs/pgpool-II-3.2.17/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.2.17/doc/pgpool-ja.html#release3.2.17 Japanese]
 +
* 3.1.20: [http://www.pgpool.net/docs/pgpool-II-3.1.20/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.1.20/doc/pgpool-ja.html#release3.1.20 Japanese]
  
== pgpool-ha 2.1 released (2013/04/26) ==
+
=== pgpool-II 3.5.3, 3.4.7, 3.3.11, 3.2.16, 3.1.19, and pgpoolAdmin 3.5.3 officially released (2016/06/17) ===
  
This is the minor version up of pgpool-ha.
+
These are the latest stable versions of each major branches.
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
  
You can download this [http://pgpool.net/mediawiki/index.php/Downloads#pgpool-HA here].
+
* 3.5.3:  [http://www.pgpool.net/docs/pgpool-II-3.5.3/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.5.3/doc/pgpool-ja.html#release3.5.3 Japanese]
 +
* 3.4.7:  [http://www.pgpool.net/docs/pgpool-II-3.4.7/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.4.7/doc/pgpool-ja.html#release3.4.7 Japanese]
 +
* 3.3.11:  [http://www.pgpool.net/docs/pgpool-II-3.3.11/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.3.11/doc/pgpool-ja.html#release3.3.11 Japanese]
 +
* 3.2.16:  [http://www.pgpool.net/docs/pgpool-II-3.2.16/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.2.16/doc/pgpool-ja.html#release3.2.16 Japanese]
 +
* 3.1.19: [http://www.pgpool.net/docs/pgpool-II-3.1.19/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.1.19/doc/pgpool-ja.html#release3.1.19 Japanese]
  
== pgpool-II 3.2.3 officially released (2013/02/18) ==
+
=== pgpool-II 3.5.2, 3.4.6, 3.3.10, 3.2.15, 3.1.18, and pgpoolAdmin 3.5.2 officially released (2016/04/26) ===
  
Theese are the latest stable versions of 3.2 whici is the latest major version. Main purpose of this release is to fix fatal problem with pgpool-II 3.2.2's health checking.
+
These are the latest stable versions of each major branches.  
  
 
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
  
Learn more about pgpool-II 3.2.3:
+
* 3.5.2:  [http://www.pgpool.net/docs/pgpool-II-3.5.2/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.5.2/doc/pgpool-ja.html#release3.5.2 Japanese]
 +
* 3.4.6:  [http://www.pgpool.net/docs/pgpool-II-3.4.6/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.4.6/doc/pgpool-ja.html#release3.4.6 Japanese]
 +
* 3.3.10:  [http://www.pgpool.net/docs/pgpool-II-3.3.10/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.3.10/doc/pgpool-ja.html#release3.3.10 Japanese]
 +
* 3.2.15:  [http://www.pgpool.net/docs/pgpool-II-3.2.15/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.2.15/doc/pgpool-ja.html#release3.2.15 Japanese]
 +
* 3.1.18: [http://www.pgpool.net/docs/pgpool-II-3.1.18/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.1.18/doc/pgpool-ja.html#release3.1.18 Japanese]
 +
 
 +
=== pgpool-II 3.5.1, 3.4.5, 3.3.9, 3.2.14, 3.1.17, and pgpoolAdmin 3.5.1 officially released (2016/04/04) ===
  
* [http://www.pgpool.net/docs/pgpool-II-3.2.3/NEWS.txt pgpool-II 3.2.3 release note(English)]
+
These are the latest stable versions of each major branches.  
* [http://www.pgpool.net/docs/pgpool-II-3.2.3/pgpool-ja.html#release3.2.3 pgpool-II 3.2.3 release note(Japanese)]
 
  
== pgpool-II 3.2.2, 3.1.6, 3.0.10 and pgpoolAdmin 3.2.2 officially released (2013/02/08) ==
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
  
Theese are the latest stable versions of each major branches.  
+
* 3.5.1:  [http://www.pgpool.net/docs/pgpool-II-3.5.1/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.5.1/doc/pgpool-ja.html#release3.5.1 Japanese]
 +
* 3.4.5:  [http://www.pgpool.net/docs/pgpool-II-3.4.5/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.4.5/doc/pgpool-ja.html#release3.4.5 Japanese]
 +
* 3.3.9:  [http://www.pgpool.net/docs/pgpool-II-3.3.9/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.3.9/doc/pgpool-ja.html#release3.3.9 Japanese]
 +
* 3.2.14:  [http://www.pgpool.net/docs/pgpool-II-3.2.14/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.2.14/doc/pgpool-ja.html#release3.2.14 Japanese]
 +
* 3.1.17: [http://www.pgpool.net/docs/pgpool-II-3.1.17/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.1.17/doc/pgpool-ja.html#release3.1.17 Japanese]
 +
 
 +
=== pgpool-II 3.4.4, 3.3.8, 3.2.13, 3.1.16, and 3.0.20 officially released (2016/02/05) ===
 +
 
 +
These are the latest stable versions of each major branches.  
  
 
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
  
Learn more about pgpool-II 3.2.2:
+
* 3.4.4:  [http://www.pgpool.net/docs/pgpool-II-3.4.4/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.4.4/doc/pgpool-ja.html#release3.4.4 Japanese]
 +
* 3.3.8:  [http://www.pgpool.net/docs/pgpool-II-3.3.8/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.3.8/doc/pgpool-ja.html#release3.3.8 Japanese]
 +
* 3.2.13:  [http://www.pgpool.net/docs/pgpool-II-3.2.13/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.2.13/doc/pgpool-ja.html#release3.2.13 Japanese]
 +
* 3.1.16: [http://www.pgpool.net/docs/pgpool-II-3.1.16/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.1.16/doc/pgpool-ja.html#release3.1.16 Japanese]
 +
* 3.0.20: [http://www.pgpool.net/docs/pgpool-II-3.0.20/doc/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.0.20/doc/pgpool-ja.html#release3.0.20 Japanese]
  
* [http://www.pgpool.net/docs/pgpool-II-3.2.2/NEWS.txt pgpool-II 3.2.2 release note(English)]
+
pgpool-II 3.0.20 is the final release of the 3.0.x. This series has reached "End of Life", and is no longer maintained and does not receive any updates.
* [http://www.pgpool.net/docs/pgpool-II-3.2.2/pgpool-ja.html#release3.2.2 pgpool-II 3.2.2 release note(Japanese)]
 
  
Learn more about pgpool-II 3.1.6:
+
=== pgpool-II 3.5.0 and pgpoolAdmin 3.5.0 officially released (2016/01/29) ===
  
* [http://www.pgpool.net/docs/pgpool-II-3.1.6/doc/NEWS.txt pgpool-II 3.1.6 release note(English)]
+
Pgpool-II 3.5.0 and pgpoolAdmin 3.5.0 are now officially released.
* [http://www.pgpool.net/docs/pgpool-II-3.1.6/doc/pgpool-ja.html#release3.1.6 pgpool-II 3.1.6 release note(Japanese)]
 
  
Learn more about pgpool-II 3.0.10:
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
  
* [http://www.pgpool.net/docs/pgpool-II-3.0.10/doc/NEWS.txt pgpool-II 3.0.10 release note(English)]
 
* [http://www.pgpool.net/docs/pgpool-II-3.0.10/doc/pgpool-ja.html#release pgpool-II 3.0.10 release note(Japanese)]
 
  
== pgpool-ha 2.0 released (2012/10/15) ==
+
V3.5's new features are:
  
This is the majar version up of pgpool-ha.
+
* Improved performance in extended query protocol
 +
* Overcoming the thundering herd problem
 +
* watchdog feature enhancements to be more robust and adaptable
 +
* PCP command enhancements
 +
* Import PostgreSQL 9.5 parser
 +
* etc.
  
You can download this [http://pgpool.net/mediawiki/index.php/Downloads#pgpool-HA here].
+
Please see [http://pgpool.net/mediawiki/index.php?title=pgpool-II_3.5_features&redirect=no this] for details.
  
== pgpoolAdmin 3.2.1 officially released (2012/10/15) ==
 
  
This is the latest version of pgpoolAdmin including a security fix for Cross-Site Scripting (XSS) vulnerability.
+
3.5.0 release note:  [http://www.pgpool.net/docs/pgpool-II-3.5.0/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.5.0/doc/pgpool-ja.html#release3.5.0 Japanese]
  
You can download this [http://pgpool.net/mediawiki/index.php/Downloads#pgpoolAdmin here].
+
=== pgpool-II 3.4.3, 3.3.7, 3.2.12, 3.1.15, and 3.0.19 officially released (2015/07/24) ===
  
== pgpool-II 3.2.1, 3.1.5, 3.0.9 officially released (2012/10/12) ==
+
These are the latest stable versions of each major branches.  
  
They are the latest versions of each major branches including variable bug fixes.
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.4.3:  [http://www.pgpool.net/docs/pgpool-II-3.4.3/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.4.3/doc/pgpool-ja.html#release3.4.3 Japanese]
 +
* 3.3.7:  [http://www.pgpool.net/docs/pgpool-II-3.3.7/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.3.7/doc/pgpool-ja.html#release3.3.7 Japanese]
 +
* 3.2.12:  [http://www.pgpool.net/docs/pgpool-II-3.2.12/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.2.12/doc/pgpool-ja.html#release3.2.12 Japanese]
 +
* 3.1.15: [http://www.pgpool.net/docs/pgpool-II-3.1.15/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.1.15/doc/pgpool-ja.html#release3.1.15 Japanese]
 +
* 3.0.19: [http://www.pgpool.net/docs/pgpool-II-3.0.19/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.0.19/doc/pgpool-ja.html#release3.0.19 Japanese]
 +
 
 +
 
 +
=== pgpool-II 3.4.2, 3.3.6, 3.2.11, 3.1.14, and 3.0.18 officially released (2015/04/08) ===
 +
 
 +
These are the latest stable versions of each major branches.  
  
 
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
  
== pgpool-II 3.1.4, 3.0.8, 2.3.4, 2.2.8 officially released (2012/08/06) ==
+
* 3.4.2:  [http://www.pgpool.net/docs/pgpool-II-3.4.2/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.4.2/doc/pgpool-ja.html#release3.4.2 Japanese]
 +
* 3.3.6:  [http://www.pgpool.net/docs/pgpool-II-3.3.6/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.3.6/doc/pgpool-ja.html#release3.3.6 Japanese]
 +
* 3.2.11:  [http://www.pgpool.net/docs/pgpool-II-3.2.11/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.2.11/doc/pgpool-ja.html#release3.2.11 Japanese]
 +
* 3.1.14: [http://www.pgpool.net/docs/pgpool-II-3.1.14/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.1.14/doc/pgpool-ja.html#release3.1.14 Japanese]
 +
* 3.0.18: [http://www.pgpool.net/docs/pgpool-II-3.0.18/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.0.18/doc/pgpool-ja.html#release3.0.18 Japanese]
  
They are the latest versions of each major branches including variable bug fixes.
+
=== pgpool-II 3.4.1, 3.3.5, 3.2.10, 3.1.13, 3.0.17  and pgpoolAdmin 3.4.1 officially released (2015/02/05) ===
 +
 
 +
These are the latest stable versions of each major branches.  
  
 
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
  
== pgpool-II 3.2 and pgpoolAdmin 3.2 officially released (2012/08/03) ==
+
* 3.4.1:  [http://www.pgpool.net/docs/pgpool-II-3.4.1/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.4.1/doc/pgpool-ja.html#release3.4.1 Japanese]
 +
* 3.3.5:  [http://www.pgpool.net/docs/pgpool-II-3.3.5/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.3.5/doc/pgpool-ja.html#release3.3.5 Japanese]
 +
* 3.2.10:  [http://www.pgpool.net/docs/pgpool-II-3.2.10/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.2.10/doc/pgpool-ja.html#release3.2.10 Japanese]
 +
* 3.1.13: [http://www.pgpool.net/docs/pgpool-II-3.1.13/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.1.13/doc/pgpool-ja.html#release3.1.13 Japanese]
 +
* 3.0.17: [http://www.pgpool.net/docs/pgpool-II-3.0.17/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.0.17/doc/pgpool-ja.html#release3.0.17 Japanese]
 +
 
 +
* pgpoolAdmin 3.4.1: [http://www.pgpool.net/docs/pgpoolAdmin-3.4.1/NEWS.txt English]
  
Pgpool-II 3.2 is now officially released. This version supports "On memory query cache" and "Watchdog".
+
=== The pgpool-II official yum repository released (2014/12/16) ===
Learn more about pgpool-II 3.2:
 
  
* [http://www.pgpool.net/pgpool-web/NEWS.txt pgpool-II 3.2 release note(English)]
+
PgPool Global Development Group announced the pgpool-II official yum repository.  
* [http://www.pgpool.net/pgpool-web/pgpool-II/doc/pgpool-ja.html#release3.2.0 pgpool-II 3.2 release note(Japanese)]
+
With this repository, you will be able to install or update pgpool-II and pgpoolAdmin etc. by using yum.
* [http://pgpool.net/mediawiki/index.php/Documentation Tutrials of new features]
 
  
== pgpool-II 3.1.3 and 3.0.7 officially released (2012/04/23) ==
+
http://www.pgpool.net/yum/
  
Pgpool-II 3.1.3 and 3.0.7 are now officially released. These are the latest stable versions of each major series.
+
The yum repository currently supports pgpool-II 3.3 or above with RHEL6 x86_64.  
  
Learn more about pgpool-II 3.1.3:
+
See [[Yum Repository]] for detail.
  
* [http://www.pgpool.net/docs/pgpool-II-3.1.3/doc/NEWS.txt pgpool-II 3.1.3 release note(English)]
+
=== pgpool-II 3.4.0 and pgpoolAdmin 3.4.0 officially released (2014/11/07) ===
* [http://www.pgpool.net/docs/pgpool-II-3.1.3/doc/pgpool-ja.html#release3.1.3 pgpool-II 3.1.3 release note(Japanese)]
 
  
Learn more about pgpool-II 3.0.7:
+
Pgpool-II 3.4.0 is now officially released.
  
* [http://www.pgpool.net/docs/pgpool-II-3.0.7/doc/NEWS.txt pgpool-II 3.0.7 release note(English)]
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
* [http://www.pgpool.net/docs/pgpool-II-3.0.7/doc/pgpool-ja.html#release3.0.7 pgpool-II 3.0.7 release note(Japanese)]
 
  
== pgpool-II 3.1.2 and 3.0.6 officially released (2012/01/31) ==
 
  
Pgpool-II 3.1.2 and 3.0.6 are now officially released. These are the latest stable versions of each major series.
+
V3.4's new features are:
  
Learn more about pgpool-II 3.1.2:
+
* Allow fine control of load balancing by using application name or database name
 +
* New features about log output
 +
** Allow to print pgpool-II process names
 +
**  Allow to control log verbosity like PostgreSQL
 +
* SQL parser compatible with PostgreSQL 9.4
 +
* Import PostgreSQL's memory manager and exception manager
 +
* Support IPv6 address
 +
* Reorganize source code tree
 +
* etc.  
  
* [http://www.pgpool.net/docs/pgpool-II-3.1.2/doc/NEWS.txt pgpool-II 3.1.2 release note(English)]
 
* [http://www.pgpool.net/docs/pgpool-II-3.1.2/doc/pgpool-ja.html#release3.1.2 pgpool-II 3.1.2 release note(Japanese)]
 
  
Learn more about pgpool-II 3.0.6:
+
* 3.4.0 release note:  [http://www.pgpool.net/docs/pgpool-II-3.4.0/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.4.0/doc/pgpool-ja.html#release3.4.0 Japanese]
  
* [http://www.pgpool.net/docs/pgpool-II-3.0.6/doc/NEWS.txt pgpool-II 3.0.6 release note(English)]
+
=== pgpool-II 3.3.4, 3.2.9, 3.1.12, and 3.0.16 are officially released (2014/09/05) ===
* [http://www.pgpool.net/docs/pgpool-II-3.0.6/doc/pgpool-ja.html#release3.0.6 pgpool-II 3.0.6 release note(Japanese)]
 
  
== pgpool-II 3.1.1 and pgpoolAdmin 3.1.1 officially released (2011/12/06) ==
+
These are the latest stable versions of each major branches.  
  
Pgpool-II 3.1.1 is now officially released. This is the latest stable version of pgpool-II 3.1 series.
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
And we also released pgpoolAdmin 3.1.
 
  
== pgpool-II 3.1 officially released (2011/09/08) ==
+
* 3.3.4:  [http://www.pgpool.net/docs/pgpool-II-3.3.4/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.3.4/doc/pgpool-ja.html#release3.3.4 Japanese]
 +
* 3.2.9:  [http://www.pgpool.net/docs/pgpool-II-3.2.9/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.2.9/doc/pgpool-ja.html#release3.2.9 Japanese]
 +
* 3.1.12: [http://www.pgpool.net/docs/pgpool-II-3.1.12/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.1.12/doc/pgpool-ja.html#release3.1.12 Japanese]
 +
* 3.0.16: [http://www.pgpool.net/docs/pgpool-II-3.0.16/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.0.16/doc/pgpool-ja.html#release3.0.16 Japanese]
  
Pgpool-II 3.1 is now officially released. This version supports syslog, more than one standby nodes in streaming replication mode, allow to specify user name with pg_md5 command. You can add new DB node or do online recovery without disturbing existing client sessions.
+
=== pgpool-ha 2.2 released (2014/04/01) ===
  
Also documents are enhanced. Simplified Chinese and French verion of documnets are added.
+
This is the latest stable version.
  
Learn more about pgpool-II 3.1:
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads#pgpool-HA here].
  
* [http://www.pgpool.net/pgpool-web/NEWS.txt pgpool-II 3.1 release note(English)]
 
* [http://www.pgpool.net/pgpool-web/pgpool-II/doc/pgpool-ja.html#release3.1.0 pgpool-II 3.1 release note(Japanese)]
 
  
= What's new (Development) =
+
=== pgpool-II 3.3.3, 3.2.8, 3.1.11, 3.0.15  and pgpoolAdmin 3.3.1 officially released (2014/03/24) ===
  
== pgpool-II 3.3 alpha1 released (2013/05/17) ==
+
These are the latest stable versions of each major branches.  
  
Pgpool-II 3.3 alpha1 is now relased. This is not a stable version but just for developers.
+
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.3.3:  [http://www.pgpool.net/docs/pgpool-II-3.3.3/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.3.3/doc/pgpool-ja.html#release3.3.3 Japanese]
 +
* 3.2.8:  [http://www.pgpool.net/docs/pgpool-II-3.2.8/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.2.8/doc/pgpool-ja.html#release3.2.8 Japanese]
 +
* 3.1.11: [http://www.pgpool.net/docs/pgpool-II-3.1.11/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.1.11/doc/pgpool-ja.html#release3.1.11 Japanese]
 +
* 3.0.15: [http://www.pgpool.net/docs/pgpool-II-3.0.15/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.0.15/doc/pgpool-ja.html#release3.0.15 Japanese]
 +
 
 +
* pgpoolAdmin 3.3.1: [http://www.pgpool.net/docs/pgpoolAdmin-3.3.1/NEWS.txt English]
 +
 
 +
=== pgpool-II 3.2.7, 3.1.10, 3.0.14 officially released (2013/12/06) ===
 +
 
 +
These are the latest stable versions of each major branches.
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.2.7:  [http://www.pgpool.net/docs/pgpool-II-3.2.7/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.2.7/doc/pgpool-ja.html#release3.2.7 Japanese]
 +
* 3.1.10: [http://www.pgpool.net/docs/pgpool-II-3.1.10/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.1.10/doc/pgpool-ja.html#release3.1.10 Japanese]
 +
* 3.0.14: [http://www.pgpool.net/docs/pgpool-II-3.0.14/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.0.14/doc/pgpool-ja.html#release3.0.14 Japanese]
 +
 
 +
=== pgpool-II 3.3.2 officially released (2013/11/29) ===
 +
 
 +
These are the latest stable version of 3.3.
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 3.3.2: [http://www.pgpool.net/docs/pgpool-II-3.3.2/NEWS.txt English] [http://www.pgpool.net/docs/pgpool-II-3.3.2/doc/pgpool-ja.html#release3.0.7 Japanese]
 +
 
 +
=== pgpool-II 3.3.1, 3.2.6, 3.1.9, 3.0.13 officially released (2013/09/06) ===
 +
 
 +
These are the latest stable versions of each major branches.
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
=== Missing regression test suite in pgpool-II 3.3.0.tar.gz (2013/07/31) ===
 +
 
 +
New regression test suite was not accidentally included in the pgpool-II 3.3.0.tar.gz tar ball.
 +
You can get it from git repository or download from
 +
[http://www.pgpool.net/download.php?f=regression-3.3.0.tar.gz here].
 +
 
 +
=== pgpool-II 3.3 and pgpoolAdmin 3.3 officially released (2013/07/30) ===
 +
 
 +
Pgpool-II 3.3 is now officially released.
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
V3.3's new features are:
  
V3.3 has a new feature:
 
 
* Enhancements for watchdog
 
* Enhancements for watchdog
 
** New monitoring method of watchdog lifecheck using heartbeat signal
 
** New monitoring method of watchdog lifecheck using heartbeat signal
 
** Interlocking of failover/failback script
 
** Interlocking of failover/failback script
 
** Secure watchdog communication
 
** Secure watchdog communication
** etc.
+
** PCP command for retrieving the watchdog status
* Othres
+
** etc.  
 +
* Othres
 
** Import PostgreSQL 9.2 raw parser
 
** Import PostgreSQL 9.2 raw parser
 
** New pgpool_setup tool
 
** New pgpool_setup tool
 
** Support for using CREATE EXTENSION to install pgpool specific extensions
 
** Support for using CREATE EXTENSION to install pgpool specific extensions
 +
** regression test suit
 +
** etc.
 +
 +
* [http://www.pgpool.net/docs/pgpool-II-3.3.0/NEWS.txt pgpool-II 3.3 release note (English)]
 +
* [http://www.pgpool.net/docs/pgpool-II-3.3.0/pgpool-ja.html#release3.3.0 pgpool-II 3.3 release note (Japanese)]
 +
 +
=== pgpool-II 3.2.5, 3.1.8, 3.0.12 officially released (2013/07/10) ===
 +
 +
These are the latest stable versions of each major branches.
 +
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 +
== Development ==
 +
 +
=== Pgpool-II 4.1 RC1 released (2019/10/16) ===
 +
 +
Pgpool-II 4.1 RC1 is now relased.
 +
 +
This is not intended to be used in production but is close to the release version. So users are encouraged to test it out.
 +
 +
Major enhancements in Pgpool-II 4.1 include:
 +
 +
* Statement level load balancing.
 +
* Auto failback.
 +
* Enhance performance in number of areas.
 +
** Shared relation cache allows to reuse relation cache among sessions to reduce internal queries against PostgreSQL system catalogs.
 +
** Have separate SQL parser for DML statements to eliminate unnecessary parsing effort.
 +
** Load balancing control for specific queries.
 +
* Reduce Internal Queries against System Catalogs.
 +
* Import PostgreSQL 12 SQL parser.
 +
* etc.
 +
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 +
Release notes:
 +
[https://www.pgpool.net/docs/41/en/html/ English]
 +
 +
=== Pgpool-II 4.1 beta1 released (2019/09/06) ===
 +
 +
Pgpool-II 4.1 beta1 is now relased.
 +
 +
This is not a stable version but just for developers.
 +
 +
Major enhancements in Pgpool-II 4.1 include:
 +
 +
* Statement level load balancing.
 +
* Auto failback.
 +
* Enhance performance in number of areas.
 +
** Shared relation cache allows to reuse relation cache among sessions to reduce internal queries against PostgreSQL system catalogs.
 +
** Have separate SQL parser for DML statements to eliminate unnecessary parsing effort.
 +
** Load balancing control for specific queries.
 +
* Reduce Internal Queries against System Catalogs.
 +
* Import PostgreSQL 12 SQL parser.
 +
* etc.
 +
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 +
Release notes:
 +
[https://www.pgpool.net/docs/41/en/html/ English]
 +
 +
=== Pgpool-II 4.0 RC1 released (2018/10/03) ===
 +
 +
Pgpool-II 4.0 RC1 is now relased.
 +
 +
This is not intended to be used in production but is close to the release version. So users are encouraged to test it out.
 +
 +
V4.0 has new features:
 +
 +
* Add SCRAM and Certificate authentication support.
 +
* Detecting "false" primary server of PostgreSQL.
 +
* Improvements to load balancing:
 +
** More load balancing fine control after write queries.
 +
** Load balancing control for specific queries.
 +
** Allow to specify load balance weight ratio for load balance parameters.
 +
* Add last state change timestamp to SHOW POOL NODES.
 +
* Import PostgreSQL 11 SQL parser.
 +
* Logging client messages.
 +
* etc.
 +
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 +
Release notes:
 +
[https://www.pgpool.net/docs/pgpool-II-4.0/en/html/release-4-0.html English]
 +
 +
=== Pgpool-II 4.0 beta1 released (2018/09/19) ===
 +
 +
Pgpool-II 4.0 beta1 is now relased.
 +
 +
This is not a stable version but just for developers.
 +
 +
V4.0 has new features:
 +
 +
* Add SCRAM and Certificate authentication support.
 +
* Detecting "false" primary server of PostgreSQL.
 +
* Improvements to load balancing:
 +
** More load balancing fine control after write queries.
 +
** Load balancing control for specific queries.
 +
** Allow to specify load balance weight ratio for load balance parameters.
 +
* Add last state change timestamp to SHOW POOL NODES.
 +
* Import PostgreSQL 11 SQL parser.
 +
* Logging client messages.
 +
* etc.
 +
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 +
Release notes:
 +
[https://www.pgpool.net/docs/pgpool-II-4.0/en/html/release-4-0.html English]
 +
 +
=== Pgpool-II 4.0 alpha2 released (2018/09/06) ===
 +
 +
Pgpool-II 4.0 alpha2 is now relased.
 +
 +
This is not a stable version but just for developers.
 +
 +
V4.0 has new features:
 +
 +
* Add SCRAM and Certificate authentication support.
 +
* Detecting "false" primary server of PostgreSQL.
 +
* Improvements to load balancing:
 +
** More load balancing fine control after write queries.
 +
** Load balancing control for specific queries.
 +
** Allow to specify load balance weight ratio for load balance parameters.
 +
* Add last state change timestamp to SHOW POOL NODES.
 +
* Import PostgreSQL 11 SQL parser.
 +
* Logging client messages.
 +
* etc.
 +
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 +
Release notes:
 +
[https://www.pgpool.net/docs/pgpool-II-4.0/en/html/release-4-0.html English]
 +
 +
=== Pgpool-II 4.0 alpha1 released (2018/08/20) ===
 +
 +
Pgpool-II 4.0 alpha1 is now relased.
 +
 +
This is not a stable version but just for developers.
 +
 +
V4.0 has new features:
 +
 +
* Add SCRAM and Certificate authentication support.
 +
* Detecting "false" primary server of PostgreSQL.
 +
* Improvements to load balancing:
 +
** More load balancing fine control after write queries.
 +
** Load balancing control for specific queries.
 +
** Allow to specify load balance weight ratio for load balance parameters.
 +
* Add last state change timestamp to SHOW POOL NODES.
 +
*Logging client messages.
 +
* etc.
 +
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
== pgpool-II 3.2 RC3 released (2012/07/31) ==
+
Release notes:
 +
[https://www.pgpool.net/docs/pgpool-II-4.0/en/html/release-4-0.html English]
 +
 
 +
=== Pgpool-II 3.7 RC1 and pgpoolAdmin 3.7 RC1 released (2017/11/13) ===
  
Pgpool-II 3.2 RC3 is now relased. This is not a stable version but just for developers. We're going to release 3.2 as stable on Aug 3rd.
+
Pgpool-II 3.7 RC1 and pgpoolAdmin 3.7 RC1 are now relased.  
 +
 
 +
This is not intended to be used in production but is close to the
 +
release version. So users are encouraged to test it out.
 +
 
 +
V3.7 has new features:
 +
* Quorum aware failover feature.
 +
* Allow specifying the hostnames in pool_hba.
 +
* Allow to specify per node health check parameters.
 +
* Support AWS Aurora.
 +
* Import PostgreSQL 10 SQL parser.
 +
* Support logical replication.  
 +
* etc.
  
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
== pgpool-II 3.2 RC2 released (2012/07/27) ==
+
Release notes:
 +
[http://www.pgpool.net/docs/pgpool-II-3.7.0/doc/en/html/release-3-7.html English] [http://www.pgpool.net/docs/pgpool-II-3.7.0/doc/ja/html/release-3-7.html Japanese]
 +
 
 +
=== Pgpool-II 3.7 beta1 released (2017/10/17) ===
 +
 
 +
Pgpool-II 3.7 beta1 is now relased. This is not a stable version but just for developers.
  
Pgpool-II 3.2 RC2 is now relased. This is not a stable version but just for developers.
+
V3.7 has new features:
 +
* Quorum aware failover feature.
 +
* Allow specifying the hostnames in pool_hba.
 +
* Allow to specify per node health check parameters.
 +
* Support AWS Aurora.
 +
* Import PostgreSQL 10 SQL parser.
 +
* Support logical replication.
 +
* etc.
  
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
== pgpool-II 3.2 RC1 released (2012/07/20) ==
+
=== pgpool-II 3.6 RC1 released (2016/11/16) ===
  
Pgpool-II 3.2 RC1 is now relased. This is not a stable version but just for developers.
+
pgpool-II 3.6 RC1 is now relased. This is not a stable version but just for developers.
  
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
== pgpool-II 3.2 beta2 released (2012/07/13) ==
+
=== pgpool-II 3.6 beta2 released (2016/11/08) ===
  
Pgpool-II 3.2 beta2 is now relased. This is not a stable version but just for developers.
+
pgpool-II 3.6 beta2 is now relased. This is not a stable version but just for developers.
  
Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.2 better!
+
Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.6 better!
  
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
== pgpool-II 3.2 beta1 released (2012/07/06) ==
+
=== pgpool-II 3.6 beta1 released (2016/11/02) ===
  
Pgpool-II 3.2 beta1 is now relased. This is not a stable version but just for developers.
+
pgpool-II 3.6 beta1 is now relased. This is not a stable version but just for developers.
  
Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.2 better!
+
Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.6 better!
  
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
== pgpool-II 3.2 alpha2 released (2012/06/29) ==
+
=== Pgpool-II 3.6 alpha1 released (2016/10/19) ===
 +
 
 +
Pgpool-II 3.6 alpha1 is now relased. This is not a stable version but just for developers.
  
Pgpool-II 3.2 alpha2 is now relased. This is not a stable version but just for developers.
+
V3.6 has a new feature:
 +
* Improve the behavior of fail-over.
 +
* New PGPOOL SET command has been introduced.
 +
* Watchdog is significantly enhanced.
 +
* Handling of extended query protocol (e.g. used by Java applications) in streaming replication mode speeds up if many rows are returned in a result set.
 +
* Import parser of PostgreSQL 9.6.
 +
* In some cases pg_terminate_backend() now does not trigger a fail-over.
 +
* Change documentation format from raw HTML to SGML.
 +
* etc.
  
V3.2 is added a new feature: watchdog. This is a sub process of pgpool-II aiming for adding high availability feature.
 
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
== pgpoolAdmin 3.2 alpha1 released (2012/06/04) ==
+
=== pgpool-II 3.5 RC1 released (2016/1/14) ===
  
PgpoolAdmin 3.2 alpha1 is now relased. This is not a stable version but just for developers.
+
pgpool-II 3.5 RC1 and pgpoolAdmin 3.5 RC1 are now relased. This is not a stable version but just for developers.
V3.2 is not only for pgpool-II V3.2 but also for older versions (V2.0 -).
 
  
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
== pgpool-II 3.2 alpha1 released (2012/05/16) ==
+
=== pgpool-II 3.5 beta1 released (2015/12/14) ===
  
Pgpool-II 3.2 alpha1 is now relased. This is not a stable version but just for developers.
+
pgpool-II 3.5 beta1 and pgpoolAdmin 3.5 beta1 are now relased. This is not a stable version but just for developers.
 +
 
 +
Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.5 better!
 +
 
 +
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 
 +
=== pgpool-II 3.5 alpha1 released (2015/11/16) ===
 +
 
 +
Pgpool-II 3.5 alpha1 is now relased. This is not a stable version but just for developers.
 +
 
 +
V3.5 has a new feature:
 +
* Improved performance in extended query protocol
 +
* Overcoming the thundering herd problem
 +
* watchdog feature enhancements to be more robust and adaptable
 +
* PCP command enhancements
 +
* Import PostgreSQL 9.5 parser
 +
* etc.
 +
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 
 +
 
 +
=== pgpool-II 3.3 RC1 released (2013/07/25) ===
 +
 
 +
Pgpool-II 3.3 RC1 is now relased. This is not a stable version but just for developers.
 +
 
 +
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 
 +
=== pgpool-II 3.3 beta1 released (2013/06/12) ===
 +
 
 +
Pgpool-II 3.3 beta1 is now relased. This is not a stable version but just for developers.
 +
 
 +
Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.3 better!
 +
 
 +
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 
 +
=== pgpool-II 3.3 alpha1 released (2013/05/17) ===
 +
 
 +
Pgpool-II 3.3 alpha1 is now relased. This is not a stable version but just for developers.
 +
 
 +
V3.3 has a new feature:
 +
* Enhancements for watchdog
 +
** New monitoring method of watchdog lifecheck using heartbeat signal
 +
** Interlocking of failover/failback script
 +
** Secure watchdog communication
 +
** etc.
 +
* Othres
 +
** Import PostgreSQL 9.2 raw parser
 +
** New pgpool_setup tool
 +
** Support for using CREATE EXTENSION to install pgpool specific extensions
 +
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
V3.2 has a new feature: On memory query cache. You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
+
== Old ==
 +
See [[Old news|this page]].
  
 
= Where can I get commercial support for pgpool-II? =
 
= Where can I get commercial support for pgpool-II? =
  
Some commercial packages include pgpool-II support. Consulting and annual support can be purchased from SRA OSS, Inc. Japan(http://www.sraoss.co.jp/index_en.php).
+
Some commercial packages include pgpool-II support. Consulting and annual support can be purchased from SRA OSS, Inc. Japan (http://www.sraoss.co.jp/index_en.php).

Latest revision as of 02:06, 17 September 2020



Contents

Welcome to Pgpool Wiki!

What is Pgpool-II?

Pgpool-II is a middleware that works between PostgreSQL servers and a PostgreSQL database client. It is licensed under BSD license. It provides the following features.

  • Connection Pooling
Pgpool-II saves connections to the PostgreSQL servers, and reuse them whenever a new connection with the same properties (i.e. username, database, protocol version) comes in. It reduces connection overhead, and improves system's overall throughput.
  • Replication
Pgpool-II can manage multiple PostgreSQL servers. Using the replication function enables creating a realtime backup on 2 or more physical disks, so that the service can continue without stopping servers in case of a disk failure.
  • Load Balancing
If a database is replicated, executing a SELECT query on any server will return the same result. Pgpool-II takes an advantage of the replication feature to reduce the load on each PostgreSQL server by distributing SELECT queries among multiple servers, improving system's overall throughput. At best, performance improves proportionally to the number of PostgreSQL servers. Load balance works best in a situation where there are a lot of users executing many queries at the same time.
  • Limiting Exceeding Connections
There is a limit on the maximum number of concurrent connections with PostgreSQL, and connections are rejected after this many connections. Setting the maximum number of connections, however, increases resource consumption and affect system performance. pgpool-II also has a limit on the maximum number of connections, but extra connections will be queued instead of returning an error immediately.
  • Watchdog
Watchdog can coordinate multiple Pgpool-II, create a robust cluster system and avoid the single point of failure or split brain. Watchdog can perform lifecheck against other pgpool-II nodes, to detect a fault of Pgpoll-II. If active Pgpool-II goes down, standby Pgpool-II can be promoted to active, and take over Virtual IP.
  • In Memory Query Cache
In memory query cache allows to save a pair of SELECT statement and its result. If an identical SELECTs comes in, Pgpool-II returns the value from cache. Since no SQL parsing nor access to PostgreSQL are involved, using in memory cache is extremely fast. On the other hand, it might be slower than the normal path in some cases, because it adds some overhead of storing cache data.

Pgpool-II speaks PostgreSQL's backend and frontend protocol, and relays messages between a backend and a frontend. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used with Pgpool-II almost without a

Pgpool-II talks PostgreSQL's backend and frontend protocol, and relays a connection between them. Therefore, a database application (frontend) thinks that Pgpool-II is the actual PostgreSQL server, and the server (backend) sees Pgpool-II as one of its clients. Because Pgpool-II is transparent to both the server and the client, an existing database application can be used with Pgpool-II almost without a change to its sources.

Pgpool-II License

See License.

Stable versions

  • Pgpool-II: 4.0, 3.7, 3.6, 3.5, 3.4
  • pgpoolAdmin: 4.0, 3.7, 3.6, 3.5, 3.4

Contacts

  • If you have technical questions regarding Pgpool-II, please subscribe Pgpool-II mailing lists and send questions to it (pgpool-general will be a starter). Please do not send technical questions via private email. We will not respond such that messages.
  • If you believe that you found a vulnerability/security issues with Pgpool-II, please send a private email to ishii at sraoss.co.jp (he is the project leader).

What's new

News

Pgpool-II 4.1.4, 4.0.11, 3.7.16, 3.6.23 and 3.5.27 officially released (2020/09/17)

Pgpool-II 4.1.4, 4.0.11, 3.7.16, 3.6.23 and 3.5.27 officially released

You can download them here.

Events

PGConf.ASIA 2019 in Bali

Bo Peng is going to give a presentation Setup a High-Availability and Load Balancing PostgreSQL Cluster: New Features of Pgpool-II 4.1 at "PGConf.ASIA 2019" held in Bali from September 8th to 11st.

PGConf.ASIA 2018 in Tokyo

Tatsuo Ishii and Bo Peng are going to give a presentation Celebrating its 15th Anniversary Pgpool-II Past Present and Future Celebrating its 15th Anniversary Pgpool-II Past Present and Future part2 at "PGConf.ASIA 2018" held in Tokyo from December 10th to 12th.

PGConf.ASIA 2017 in Tokyo

Tatsuo Ishii is going to give a presentation "More reliability and support for PostgreSQL 10: Introducing Pgpool-II 3.7" at "PGConf.ASIA 2017", held in Tokyo from December 4th to 6th.

PostgreSQL Conference in Russia 2016

Tatsuo gave a talk "How to manage a herd of elephants" at "PostgreSQL Conference in Russia 2016", held in Moscow from February 4th to 5th. The slides are available in Developer's documentation.

PostgreSQL Conference in China 2015

Tatsuo gave a talk "How to manage a herd of elephants" at "PostgreSQL Conference in China 2015", held in Beijing from November 21th to 22th. The slides are available in Developer's documentation.

pgCon 2015 Cluster Hacker Summit

We participated "6th Postgres Cluster Hacker Summit" which was held as a part of PgCon 2015 Developer Unconference. We reported about Development Status Updates and pgpool-II 3.5 features. The slides are available in Developer's documentation.

Pgpool-II Day 2015 in Tokyo

We had the very first time pgpool-II decicated conference. See the event report.

New docs

pgpool-II 3.5 is coming soon!

pgpool-II 3.5 alpha1 has been out. Tatsuo introduces "new features of pgpool-II 3.5."

Stable

Pgpool-II 4.1.4, 4.0.11, 3.7.16, 3.6.23 and 3.5.27 officially released (2020/09/17)

Pgpool-II 4.1.4, 4.0.11, 3.7.16, 3.6.23 and 3.5.27 officially released

You can download them here.

Pgpool-II 4.1.3, 4.0.10, 3.7.15, 3.6.22 and 3.5.26 officially released (2020/08/20)

Pgpool-II 4.1.3, 4.0.10, 3.7.15, 3.6.22 and 3.5.26 officially released

You can download them here.

Pgpool-II 4.1.2, 4.0.9, 3.7.14, 3.6.21 and 3.5.25 officially released (2020/05/21)

Pgpool-II 4.1.2, 4.0.9, 3.7.14, 3.6.21 and 3.5.25 officially released

You can download them here.

Pgpool-II 4.1.1, 4.0.8, 3.7.13, 3.6.20, 3.5.24 and pgpoolAdmin 4.1.0 officially released (2020/02/20)

Pgpool-II 4.1.1, 4.0.8, 3.7.13, 3.6.20, 3.5.24 and pgpoolAdmin 4.1.0 officially released

You can download them here.

Pgpool-II 4.1.0, 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 RPMs Update 2 officially released (2019/11/19)

Pgpool-II 4.1.0, 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 RPMs Update 2 are officially released. The updated RPM packages fixed the bug which logs are not output, when log_destination = 'syslog' is configured.

You can download them here.

Pgpool-II 4.1.0 released (2019/10/31)

Pgpool-II 4.1.0 is now relased.

Major enhancements in Pgpool-II 4.1 include:

  • Statement level load balancing.
  • Auto failback.
  • Enhance performance in number of areas.
    • Shared relation cache allows to reuse relation cache among sessions to reduce internal queries against PostgreSQL system catalogs.
    • Have separate SQL parser for DML statements to eliminate unnecessary parsing effort.
    • Load balancing control for specific queries.
  • Reduce Internal Queries against System Catalogs.
  • Import PostgreSQL 12 SQL parser.
  • etc.

You can download it from here.

Release notes: English Japanese

Pgpool-II 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 officially released (2019/10/31)

Pgpool-II 4.0.7, 3.7.12, 3.6.19, 3.5.23 and 3.4.26 officially released

Please note that 3.4.26 is the last release of 3.4 series because 5 years has passed since 3.4 was out (2014/11).

You can download them here.

Pgpool-II 4.0.6, 3.7.11, 3.6.18, 3.5.22 and 3.4.25 officially released (2019/08/15)

Pgpool-II 4.0.6, 3.7.11, 3.6.18, 3.5.22 and 3.4.25 officially released

You can download them here.

Pgpool-II 4.0.5, 3.7.10, 3.6.17, 3.5.21 and 3.4.24 officially released (2019/05/16)

Pgpool-II 4.0.5, 3.7.10, 3.6.17, 3.5.21 and 3.4.24 officially released

You can download them here.

Pgpool-II 4.0.4, 3.7.9, 3.6.16, 3.5.20 and 3.4.23 officially released (2019/03/29)

Pgpool-II 4.0.4, 3.7.9, 3.6.16, 3.5.20 and 3.4.23 officially released

You can download them here.

Pgpool-II 4.0.3, 3.7.8, 3.6.15, 3.5.19 and 3.4.22 officially released (2019/02/21)

Pgpool-II 4.0.3, 3.7.8, 3.6.15, 3.5.19 and 3.4.22 officially released

You can download them here.

pgpoolAdmin 4.0.1 officially released (2018/12/20)

PgPool Global Development Group has released a Security Update of pgpoolAdmin.

The purpose of this release is to address CVE-2018-16203, which allow an attacker to login without properly checking the authorization. Once getting into gpoolAdmin, the attacker can control Pgpool-II. Also it may be possible to obtain the superuser role of a PostgreSQL database.

This vulnability affects all versions of pgpoolAdmin. We recommend upgrade pgpoolAdmin to 4.0.1 immediately (remember that PgpoolAdmin 4.0.1 is compatible with Pgpool-II 3.4 or later).

PgPool Global Development Group would like to thank Fotios Rogkotis of DarkMatter for finding the security issue and giving us the detailed studies on it.

You can download them here.

Pgpool-II 4.0.2, 3.7.7, 3.6.14, 3.5.18 and 3.4.21 officially released (2018/11/22)

Pgpool-II 4.0.2, 3.7.7, 3.6.14, 3.5.18 and 3.4.21 officially released

You can download them here.

Pgpool-II 4.0.1, 3.7.6, 3.6.13, 3.5.17 and 3.4.20 officially released (2018/10/31)

Pgpool-II 4.0.1, 3.7.6, 3.6.13, 3.5.17 and 3.4.20 officially released

You can download them here.

Pgpool-II 4.0.0 and pgpoolAdmin 4.0.0 officially released (2018/10/19)

Pgpool-II 4.0.0 and pgpoolAdmin 4.0.0 are now relased.

V4.0 has new features:

  • Add SCRAM and Certificate authentication support.
  • Detecting "false" primary server of PostgreSQL.
  • Improvements to load balancing:
    • More load balancing fine control after write queries.
    • Load balancing control for specific queries.
    • Allow to specify load balance weight ratio for load balance parameters.
  • Add last state change timestamp to SHOW POOL NODES.
  • Import PostgreSQL 11 SQL parser.
  • Logging client messages.
  • etc.

You can download it from here.

Release notes: English Japanese

Pgpool-II 3.7.5, 3.6.12, 3.5.16, 3.4.19 and 3.3.22 officially released (2018/07/31)

Pgpool-II 3.7.5, 3.6.12, 3.5.16, 3.4.19 and 3.3.22 officially released

You can download them here.

Please note that 3.3.22 is the last release of 3.3 series because 5 years has passed since 3.3 was out (2013/07/30).

Pgpool-II 3.7.4, 3.6.11, 3.5.15 and 3.4.18 officially released (2018/06/12)

Pgpool-II 3.7.4, 3.6.11, 3.5.15 and 3.4.18 officially released

You can download them here.

Pgpool-II 3.7.3, 3.6.10, 3.5.14, 3.4.17 and 3.3.21 officially released (2018/04/17)

Pgpool-II 3.7.3, 3.6.10, 3.5.14, 3.4.17 and 3.3.21 officially released

You can download them here.

Pgpool-II 3.7.2-2 RPMs are released. (2018/03/14)

Pgpool-II 3.7.2-2 RPMs are released.

You can download them here.

Pgpool-II 3.7.2, 3.6.9, 3.5.13, 3.4.16 and 3.3.20 officially released (2018/02/13)

Pgpool-II 3.7.2, 3.6.9, 3.5.13, 3.4.16 and 3.3.20 officially released

You can download them here.

pgpoolAdmin 3.7.1 officially released (2018/02/05)

pgpoolAdmin 3.7.1 is officially released.

You can download them here.

Release notes

Pgpool-II 3.7.1, 3.6.8, 3.5.12, 3.4.15 and 3.3.19 officially released (2018/01/09)

Pgpool-II 3.7.1, 3.6.8, 3.5.12, 3.4.15 and 3.3.19 officially released

You can download them here.

Pgpool-II 3.7.0 and pgpoolAdmin 3.7.0 officially released (2017/11/22)

Pgpool-II 3.7.0 and pgpoolAdmin 3.7.0 are now relased.

V3.7 has new features:

  • Quorum aware failover feature.
  • Allow specifying the hostnames in pool_hba.
  • Allow to specify per node health check parameters.
  • Support AWS Aurora.
  • Import PostgreSQL 10 SQL parser.
  • Support logical replication.
  • etc.

You can download them here.

Release notes: English Japanese

Pgpool-II 3.6.7, 3.5.11, 3.4.14 and 3.3.18 officially released (2017/11/01)

Pgpool-II 3.6.7, 3.5.11, 3.4.14 and 3.3.18 officially released

You can download them here.

Pgpool-II 3.6.6, 3.5.10, 3.4.13, 3.3.17 and 3.2.22 officially released (2017/09/05)

Pgpool-II 3.6.6, 3.5.10, 3.4.13, 3.3.17, 3.2.22 and pgpoolAdmin 3.6.2 officially released

You can download them here.

Pgpool-II 3.6.5, 3.5.9, 3.4.12, 3.3.16 and 3.2.21 officially released (2017/07/11)

Pgpool-II 3.6.5, 3.5.9, 3.4.12, 3.3.16 and 3.2.21 officially released

You can download them here.

Pgpool-II 3.6.4, 3.5.8 officially released (2017/05/11)

Pgpool-II 3.6.4, 3.5.8 officially released

You can download them here.

Pgpool-II 3.6.3, 3.5.7, 3.4.11, 3.3.15, 3.2.20 and pgpoolAdmin 3.6.1 officially released (2017/04/28)

Pgpool-II 3.6.3, 3.5.7, 3.4.11, 3.3.15, 3.2.20 and pgpoolAdmin 3.6.1 officially released

You can download them here.

Pgpool-II 3.6.2, 3.5.6, 3.4.10, 3.3.14 and 3.2.19 officially released (2017/03/17)

Pgpool-II 3.6.2, 3.5.6, 3.4.10, 3.3.14 and 3.2.19 officially released

You can download them here.

pgpoolAdmin 3.6.0 officially released (2017/02/28)

pgpoolAdmin 3.6.0 is officially released.

You can download them here.

pgpool-II 3.6.1, 3.5.5, 3.4.9, 3.3.13, 3.2.18 and 3.1.21 officially released (2016/12/26)

These are the latest stable versions of each major branches.

You can download them here.

pgpool-II 3.1.21 is the final release of the 3.1.x. This series has reached "End of Life", and is no longer maintained and does not receive any updates.

pgpool-II 3.6.0 officially released (2016/11/21)

Pgpool-II 3.6.0 is now officially released.

You can download them here.

V3.6's new features are:

  • Improve the behavior of fail-over.
  • New PGPOOL SET command has been introduced.
  • Watchdog is significantly enhanced.
  • Handling of extended query protocol (e.g. used by Java applications) in streaming replication mode speeds up if many rows are returned in a result set.
  • Import parser of PostgreSQL 9.6.
  • In some cases pg_terminate_backend() now does not trigger a fail-over.
  • Change documentation format from raw HTML to SGML.
  • etc.

pgpool-II 3.5.4, 3.4.8, 3.3.12, 3.2.17 and 3.1.20 officially released (2016/08/31)

These are the latest stable versions of each major branches.

You can download them here.

pgpool-II 3.5.3, 3.4.7, 3.3.11, 3.2.16, 3.1.19, and pgpoolAdmin 3.5.3 officially released (2016/06/17)

These are the latest stable versions of each major branches.

You can download them here.

pgpool-II 3.5.2, 3.4.6, 3.3.10, 3.2.15, 3.1.18, and pgpoolAdmin 3.5.2 officially released (2016/04/26)

These are the latest stable versions of each major branches.

You can download them here.

pgpool-II 3.5.1, 3.4.5, 3.3.9, 3.2.14, 3.1.17, and pgpoolAdmin 3.5.1 officially released (2016/04/04)

These are the latest stable versions of each major branches.

You can download them here.

pgpool-II 3.4.4, 3.3.8, 3.2.13, 3.1.16, and 3.0.20 officially released (2016/02/05)

These are the latest stable versions of each major branches.

You can download them here.

pgpool-II 3.0.20 is the final release of the 3.0.x. This series has reached "End of Life", and is no longer maintained and does not receive any updates.

pgpool-II 3.5.0 and pgpoolAdmin 3.5.0 officially released (2016/01/29)

Pgpool-II 3.5.0 and pgpoolAdmin 3.5.0 are now officially released.

You can download them here.


V3.5's new features are:

  • Improved performance in extended query protocol
  • Overcoming the thundering herd problem
  • watchdog feature enhancements to be more robust and adaptable
  • PCP command enhancements
  • Import PostgreSQL 9.5 parser
  • etc.

Please see this for details.


3.5.0 release note: English Japanese

pgpool-II 3.4.3, 3.3.7, 3.2.12, 3.1.15, and 3.0.19 officially released (2015/07/24)

These are the latest stable versions of each major branches.

You can download them here.


pgpool-II 3.4.2, 3.3.6, 3.2.11, 3.1.14, and 3.0.18 officially released (2015/04/08)

These are the latest stable versions of each major branches.

You can download them here.

pgpool-II 3.4.1, 3.3.5, 3.2.10, 3.1.13, 3.0.17 and pgpoolAdmin 3.4.1 officially released (2015/02/05)

These are the latest stable versions of each major branches.

You can download them here.

The pgpool-II official yum repository released (2014/12/16)

PgPool Global Development Group announced the pgpool-II official yum repository. With this repository, you will be able to install or update pgpool-II and pgpoolAdmin etc. by using yum.

http://www.pgpool.net/yum/

The yum repository currently supports pgpool-II 3.3 or above with RHEL6 x86_64.

See Yum Repository for detail.

pgpool-II 3.4.0 and pgpoolAdmin 3.4.0 officially released (2014/11/07)

Pgpool-II 3.4.0 is now officially released.

You can download them here.


V3.4's new features are:

  • Allow fine control of load balancing by using application name or database name
  • New features about log output
    • Allow to print pgpool-II process names
    • Allow to control log verbosity like PostgreSQL
  • SQL parser compatible with PostgreSQL 9.4
  • Import PostgreSQL's memory manager and exception manager
  • Support IPv6 address
  • Reorganize source code tree
  • etc.


pgpool-II 3.3.4, 3.2.9, 3.1.12, and 3.0.16 are officially released (2014/09/05)

These are the latest stable versions of each major branches.

You can download them here.

pgpool-ha 2.2 released (2014/04/01)

This is the latest stable version.

You can download them here.


pgpool-II 3.3.3, 3.2.8, 3.1.11, 3.0.15 and pgpoolAdmin 3.3.1 officially released (2014/03/24)

These are the latest stable versions of each major branches.

You can download them here.

pgpool-II 3.2.7, 3.1.10, 3.0.14 officially released (2013/12/06)

These are the latest stable versions of each major branches.

You can download them here.

pgpool-II 3.3.2 officially released (2013/11/29)

These are the latest stable version of 3.3.

You can download them here.

pgpool-II 3.3.1, 3.2.6, 3.1.9, 3.0.13 officially released (2013/09/06)

These are the latest stable versions of each major branches.

You can download them here.

Missing regression test suite in pgpool-II 3.3.0.tar.gz (2013/07/31)

New regression test suite was not accidentally included in the pgpool-II 3.3.0.tar.gz tar ball. You can get it from git repository or download from here.

pgpool-II 3.3 and pgpoolAdmin 3.3 officially released (2013/07/30)

Pgpool-II 3.3 is now officially released.

You can download them here.

V3.3's new features are:

  • Enhancements for watchdog
    • New monitoring method of watchdog lifecheck using heartbeat signal
    • Interlocking of failover/failback script
    • Secure watchdog communication
    • PCP command for retrieving the watchdog status
    • etc.
  • Othres
    • Import PostgreSQL 9.2 raw parser
    • New pgpool_setup tool
    • Support for using CREATE EXTENSION to install pgpool specific extensions
    • regression test suit
    • etc.

pgpool-II 3.2.5, 3.1.8, 3.0.12 officially released (2013/07/10)

These are the latest stable versions of each major branches.

You can download them here.

Development

Pgpool-II 4.1 RC1 released (2019/10/16)

Pgpool-II 4.1 RC1 is now relased.

This is not intended to be used in production but is close to the release version. So users are encouraged to test it out.

Major enhancements in Pgpool-II 4.1 include:

  • Statement level load balancing.
  • Auto failback.
  • Enhance performance in number of areas.
    • Shared relation cache allows to reuse relation cache among sessions to reduce internal queries against PostgreSQL system catalogs.
    • Have separate SQL parser for DML statements to eliminate unnecessary parsing effort.
    • Load balancing control for specific queries.
  • Reduce Internal Queries against System Catalogs.
  • Import PostgreSQL 12 SQL parser.
  • etc.

You can download it from here.

Release notes: English

Pgpool-II 4.1 beta1 released (2019/09/06)

Pgpool-II 4.1 beta1 is now relased.

This is not a stable version but just for developers.

Major enhancements in Pgpool-II 4.1 include:

  • Statement level load balancing.
  • Auto failback.
  • Enhance performance in number of areas.
    • Shared relation cache allows to reuse relation cache among sessions to reduce internal queries against PostgreSQL system catalogs.
    • Have separate SQL parser for DML statements to eliminate unnecessary parsing effort.
    • Load balancing control for specific queries.
  • Reduce Internal Queries against System Catalogs.
  • Import PostgreSQL 12 SQL parser.
  • etc.

You can download it from here.

Release notes: English

Pgpool-II 4.0 RC1 released (2018/10/03)

Pgpool-II 4.0 RC1 is now relased.

This is not intended to be used in production but is close to the release version. So users are encouraged to test it out.

V4.0 has new features:

  • Add SCRAM and Certificate authentication support.
  • Detecting "false" primary server of PostgreSQL.
  • Improvements to load balancing:
    • More load balancing fine control after write queries.
    • Load balancing control for specific queries.
    • Allow to specify load balance weight ratio for load balance parameters.
  • Add last state change timestamp to SHOW POOL NODES.
  • Import PostgreSQL 11 SQL parser.
  • Logging client messages.
  • etc.

You can download it from here.

Release notes: English

Pgpool-II 4.0 beta1 released (2018/09/19)

Pgpool-II 4.0 beta1 is now relased.

This is not a stable version but just for developers.

V4.0 has new features:

  • Add SCRAM and Certificate authentication support.
  • Detecting "false" primary server of PostgreSQL.
  • Improvements to load balancing:
    • More load balancing fine control after write queries.
    • Load balancing control for specific queries.
    • Allow to specify load balance weight ratio for load balance parameters.
  • Add last state change timestamp to SHOW POOL NODES.
  • Import PostgreSQL 11 SQL parser.
  • Logging client messages.
  • etc.

You can download it from here.

Release notes: English

Pgpool-II 4.0 alpha2 released (2018/09/06)

Pgpool-II 4.0 alpha2 is now relased.

This is not a stable version but just for developers.

V4.0 has new features:

  • Add SCRAM and Certificate authentication support.
  • Detecting "false" primary server of PostgreSQL.
  • Improvements to load balancing:
    • More load balancing fine control after write queries.
    • Load balancing control for specific queries.
    • Allow to specify load balance weight ratio for load balance parameters.
  • Add last state change timestamp to SHOW POOL NODES.
  • Import PostgreSQL 11 SQL parser.
  • Logging client messages.
  • etc.

You can download it from here.

Release notes: English

Pgpool-II 4.0 alpha1 released (2018/08/20)

Pgpool-II 4.0 alpha1 is now relased.

This is not a stable version but just for developers.

V4.0 has new features:

  • Add SCRAM and Certificate authentication support.
  • Detecting "false" primary server of PostgreSQL.
  • Improvements to load balancing:
    • More load balancing fine control after write queries.
    • Load balancing control for specific queries.
    • Allow to specify load balance weight ratio for load balance parameters.
  • Add last state change timestamp to SHOW POOL NODES.
  • Logging client messages.
  • etc.

You can download it from here.

Release notes: English

Pgpool-II 3.7 RC1 and pgpoolAdmin 3.7 RC1 released (2017/11/13)

Pgpool-II 3.7 RC1 and pgpoolAdmin 3.7 RC1 are now relased.

This is not intended to be used in production but is close to the release version. So users are encouraged to test it out.

V3.7 has new features:

  • Quorum aware failover feature.
  • Allow specifying the hostnames in pool_hba.
  • Allow to specify per node health check parameters.
  • Support AWS Aurora.
  • Import PostgreSQL 10 SQL parser.
  • Support logical replication.
  • etc.

You can download it from here.

Release notes: English Japanese

Pgpool-II 3.7 beta1 released (2017/10/17)

Pgpool-II 3.7 beta1 is now relased. This is not a stable version but just for developers.

V3.7 has new features:

  • Quorum aware failover feature.
  • Allow specifying the hostnames in pool_hba.
  • Allow to specify per node health check parameters.
  • Support AWS Aurora.
  • Import PostgreSQL 10 SQL parser.
  • Support logical replication.
  • etc.

You can download it from here.

pgpool-II 3.6 RC1 released (2016/11/16)

pgpool-II 3.6 RC1 is now relased. This is not a stable version but just for developers.

You can download it from here.

pgpool-II 3.6 beta2 released (2016/11/08)

pgpool-II 3.6 beta2 is now relased. This is not a stable version but just for developers.

Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.6 better!

You can download it from here.

pgpool-II 3.6 beta1 released (2016/11/02)

pgpool-II 3.6 beta1 is now relased. This is not a stable version but just for developers.

Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.6 better!

You can download it from here.

Pgpool-II 3.6 alpha1 released (2016/10/19)

Pgpool-II 3.6 alpha1 is now relased. This is not a stable version but just for developers.

V3.6 has a new feature:

  • Improve the behavior of fail-over.
  • New PGPOOL SET command has been introduced.
  • Watchdog is significantly enhanced.
  • Handling of extended query protocol (e.g. used by Java applications) in streaming replication mode speeds up if many rows are returned in a result set.
  • Import parser of PostgreSQL 9.6.
  • In some cases pg_terminate_backend() now does not trigger a fail-over.
  • Change documentation format from raw HTML to SGML.
  • etc.

You can download it from here.

pgpool-II 3.5 RC1 released (2016/1/14)

pgpool-II 3.5 RC1 and pgpoolAdmin 3.5 RC1 are now relased. This is not a stable version but just for developers.

You can download it from here.

pgpool-II 3.5 beta1 released (2015/12/14)

pgpool-II 3.5 beta1 and pgpoolAdmin 3.5 beta1 are now relased. This is not a stable version but just for developers.

Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.5 better!

You can download it from here.

pgpool-II 3.5 alpha1 released (2015/11/16)

Pgpool-II 3.5 alpha1 is now relased. This is not a stable version but just for developers.

V3.5 has a new feature:

  • Improved performance in extended query protocol
  • Overcoming the thundering herd problem
  • watchdog feature enhancements to be more robust and adaptable
  • PCP command enhancements
  • Import PostgreSQL 9.5 parser
  • etc.

You can download it from here.


pgpool-II 3.3 RC1 released (2013/07/25)

Pgpool-II 3.3 RC1 is now relased. This is not a stable version but just for developers.

You can download it from here.

pgpool-II 3.3 beta1 released (2013/06/12)

Pgpool-II 3.3 beta1 is now relased. This is not a stable version but just for developers.

Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.3 better!

You can download it from here.

pgpool-II 3.3 alpha1 released (2013/05/17)

Pgpool-II 3.3 alpha1 is now relased. This is not a stable version but just for developers.

V3.3 has a new feature:

  • Enhancements for watchdog
    • New monitoring method of watchdog lifecheck using heartbeat signal
    • Interlocking of failover/failback script
    • Secure watchdog communication
    • etc.
  • Othres
    • Import PostgreSQL 9.2 raw parser
    • New pgpool_setup tool
    • Support for using CREATE EXTENSION to install pgpool specific extensions

You can download it from here.

Old

See this page.

Where can I get commercial support for pgpool-II?

Some commercial packages include pgpool-II support. Consulting and annual support can be purchased from SRA OSS, Inc. Japan (http://www.sraoss.co.jp/index_en.php).