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(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))
(Where can I get commercial support for pgpool-II?)
 
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'''MediaWiki has been successfully installed.'''
  
Consult the [http://meta.wikimedia.org/wiki/Help:Contents User's Guide] for information on using the wiki software.
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Consult the [https://meta.wikimedia.org/wiki/Help:Contents User's Guide] for information on using the wiki software.
  
 
== Getting started ==
 
== Getting started ==
  
* [http://www.mediawiki.org/wiki/Manual:Configuration_settings Configuration settings list]
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* [https://www.mediawiki.org/wiki/Manual:Configuration_settings Configuration settings list]
* [http://www.mediawiki.org/wiki/Manual:FAQ MediaWiki FAQ]
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* [https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce MediaWiki release mailing list]
 
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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 distributed under a license similar to BSD and MIT. 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 Balancing'''
 
* '''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.
  
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.
+
* '''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 ==
+
== Pgpool-II License ==
  
See [http://pgpool.net/mediawiki/index.php/pgpool-II_License License].
+
See [https://pgpool.net/mediawiki/index.php/pgpool-II_License License].
  
 
== Stable versions ==
 
== Stable versions ==
  
* pgpool-II: 3.5, 3.4, 3.3, 3.2, 3.1
+
* Pgpool-II: 4.3, 4.2, 4.1, 4.0, 3.7
** 3.0 is obsoleted
+
* pgpoolAdmin: 4.2, 4.1, 4.0, 3.7
* pgpoolAdmin: 3.5, 3.4, 3.3
+
 
* pgpool-HA: 2
+
== Contacts ==
 +
 
 +
* If you have technical questions regarding Pgpool-II, please subscribe [https://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 =
 
= What's new =
 +
 +
== News ==
 +
 +
=== Pgpool-II 4.3.3, 4.2.10, 4.1.13, 4.0.20 and 3.7.25 officially released (2022/08/18) ===
 +
 +
Pgpool-II 4.3.3, 4.2.10, 4.1.13, 4.0.20 and 3.7.25 officially released.
 +
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 +
* 4.3.3 :  [https://www.pgpool.net/docs/latest/en/html/release-4-3-3.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-3-3.html Japanese]
 +
* 4.2.10 :  [https://www.pgpool.net/docs/latest/en/html/release-4-2-10.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-2-10.html Japanese]
 +
* 4.1.13 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-13.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-13.html Japanese]
 +
* 4.0.20 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-20.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-20.html Japanese]
 +
* 3.7.25 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-25.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-25.html Japanese]
 +
 +
=== Pgpool-II and Log4j (2021/12/14) ===
 +
 +
Since Pgpool-II is written in C language, it is not affected by [https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44228 Log4j vulnerability].
 +
 +
Also PgpoolAdmin is not affected. It is written in PHP.
  
 
== Events ==
 
== 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
 +
[https://www.pgpool.net/download.php?f=pgpool-past-now-and-future.pdf Celebrating its 15th Anniversary Pgpool-II Past Present and Future]
 +
[https://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 [https://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  [https://www.pgconf.asia/EN/2017/day-2/#B5 "More reliability and support for PostgreSQL 10: Introducing Pgpool-II 3.7"] at [https://www.pgconf.asia/EN/2017/ "PGConf.ASIA 2017"], held in Tokyo from December 4th to 6th.
  
 
=== PostgreSQL Conference in Russia 2016 ===
 
=== 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.
 
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].
+
The slides are available in [https://pgpool.net/mediawiki/index.php/Documentation#Developer.27s_documentation Developer's documentation].
  
 
=== PostgreSQL Conference in China 2015 ===
 
=== 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.
+
Tatsuo gave a talk "How to manage a herd of elephants" at [https://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].
+
The slides are available in [https://pgpool.net/mediawiki/index.php/Documentation#Developer.27s_documentation Developer's documentation].
  
 
=== pgCon 2015 Cluster Hacker Summit ===
 
=== 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].
+
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 [https://pgpool.net/mediawiki/index.php/Documentation#Developer.27s_documentation Developer's documentation].
  
 
=== Pgpool-II Day 2015 in Tokyo ===
 
=== 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].
+
We had the very first time pgpool-II decicated conference. See the [https://pgpool.net/mediawiki/index.php/pgpool-II_Day_2015 event report].
 +
 
 +
== Stable ==
 +
 
 +
=== Pgpool-II 4.3.3, 4.2.10, 4.1.13, 4.0.20 and 3.7.25 officially released (2022/08/18) ===
 +
 
 +
Pgpool-II 4.3.3, 4.2.10, 4.1.13, 4.0.20 and 3.7.25 officially released.
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.3.3 :  [https://www.pgpool.net/docs/latest/en/html/release-4-3-3.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-3-3.html Japanese]
 +
* 4.2.10 :  [https://www.pgpool.net/docs/latest/en/html/release-4-2-10.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-2-10.html Japanese]
 +
* 4.1.13 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-13.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-13.html Japanese]
 +
* 4.0.20 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-20.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-20.html Japanese]
 +
* 3.7.25 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-25.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-25.html Japanese]
 +
 
 +
=== Pgpool-II 4.3.2, 4.2.9, 4.1.12, 4.0.19 and 3.7.24 officially released (2022/05/19) ===
 +
 
 +
Pgpool-II 4.3.2, 4.2.9, 4.1.12, 4.0.19 and 3.7.24 officially released.
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.3.2 :  [https://www.pgpool.net/docs/latest/en/html/release-4-3-2.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-3-2.html Japanese]
 +
* 4.2.9 :  [https://www.pgpool.net/docs/latest/en/html/release-4-2-9.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-2-9.html Japanese]
 +
* 4.1.12 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-12.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-12.html Japanese]
 +
* 4.0.19 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-19.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-19.html Japanese]
 +
* 3.7.24 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-24.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-24.html Japanese]
 +
 
 +
=== Pgpool-II 4.3.1, 4.2.8, 4.1.11, 4.0.18 and 3.7.23 officially released (2022/02/17) ===
 +
 
 +
Pgpool-II 4.3.1, 4.2.8, 4.1.11, 4.0.18 and 3.7.23 officially released.
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.3.1 :  [https://www.pgpool.net/docs/latest/en/html/release-4-3-1.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-3-1.html Japanese]
 +
* 4.2.8 :  [https://www.pgpool.net/docs/latest/en/html/release-4-2-8.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-2-8.html Japanese]
 +
* 4.1.11 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-11.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-11.html Japanese]
 +
* 4.0.18 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-18.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-18.html Japanese]
 +
* 3.7.23 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-23.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-23.html Japanese]
 +
 
 +
=== Pgpool-II 4.2.7, 4.1.10, 4.0.17 and 3.7.22 officially released (2021/12/23) ===
 +
 
 +
Pgpool-II 4.2.7, 4.1.10, 4.0.17 and 3.7.22 officially released.
 +
 
 +
The purpose of this release is to provide packages for PostgreSQL 14.
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.2.7 :  [https://www.pgpool.net/docs/latest/en/html/release-4-2-7.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-2-7.html Japanese]
 +
* 4.1.10 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-10.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-10.html Japanese]
 +
* 4.0.17 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-17.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-17.html Japanese]
 +
* 3.7.22 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-22.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-22.html Japanese]
 +
 
 +
=== Pgpool-II 4.3.0 released (2021/12/07) ===
 +
 
 +
Pgpool-II 4.3.0 is now released. Please take a look at [https://www.pgpool.net/docs/43/en/html/release-4-3-0.html 4.3.0]
 +
 
 +
V4.3.0 contains new features and enhancements, including:
 +
* A new membership mechanism is introduced to Watchdog to allow to keep quorum/VIP when some of watchdog nodes are removed.
 +
 
 +
* Allow to choose the least replication delay standby node when selecting the load balance node.
 +
 
 +
* Allow to specify the node id to be promoted in pcp_promote_node.
 +
 
 +
* Allow to configure to not trigger failover when PostgreSQL is shutdown by admin or killed by pg_terminate_backend.
 +
 
 +
* Add new fields to pcp_proc_info, SHOW POOL_PROCESSES and SHOW POOL_POOLS command to display more useful information to admin.
 +
 
 +
* Allow pcp_node_info to list all backend nodes information.
 +
 
 +
* Add new fields showing actual PostgreSQL status to SHOW POOL NODES command and friends.
 +
 
 +
* Add a new parameter which represents the recovery source hostname to recovery_1st_stage_command and recovery_2nd_stage_command.
 +
 
 +
* Add support for log time stamp with milliseconds.
 +
 
 +
* Import PostgreSQL 14's SQL parser.
 +
 
 +
* Support include directive in pgppol.conf file. You can have separate sub-config file to be included in pgpool.conf.
 +
 
 +
* pgpool.conf sample files are unified into single sample file for easier configuration.
 +
 
 +
* All configuration parameters in pgpool.conf sample file are commented out to clarify which parameter is needed to be changed.
 +
 
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
Release notes:
 +
[https://www.pgpool.net/docs/43/en/html/release-4-3-0.html English]
  
== New docs ==
+
=== Pgpool-II 4.2.6, 4.1.9, 4.0.16, 3.7.21 and 3.6.28 officially released (2021/11/18) ===
  
=== pgpool-II 3.5 is coming soon! ===
+
Pgpool-II 4.2.6, 4.1.9, 4.0.16, 3.7.21 and 3.6.28 officially released.
  
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."]
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
== Stable ==
+
* 4.2.6 :  [https://www.pgpool.net/docs/latest/en/html/release-4-2-6.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-2-6.html Japanese]
 +
* 4.1.9 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-9.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-9.html Japanese]
 +
* 4.0.16 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-16.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-16.html Japanese]
 +
* 3.7.21 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-21.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-21.html Japanese]
 +
* 3.6.28 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-28.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-28.html Japanese]
 +
 
 +
=== Pgpool-II 4.2.5 released (2021/09/14) ===
 +
 
 +
Pgpool Global Development Group is pleased to announce the availability of Pgpool-II 4.2.5.
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.2.5 :  [https://www.pgpool.net/docs/latest/en/html/release-4-2-5.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-2-5.html Japanese]
 +
 
 +
=== Pgpool-II 4.2.4, 4.1.8, 4.0.15, 3.7.20 and 3.6.27 officially released (2021/08/05) ===
 +
 
 +
Pgpool-II 4.2.4, 4.1.8, 4.0.15, 3.7.20 and 3.6.27 officially released.
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.2.4 :  [https://www.pgpool.net/docs/latest/en/html/release-4-2-4.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-2-4.html Japanese]
 +
* 4.1.8 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-8.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-8.html Japanese]
 +
* 4.0.15 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-15.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-15.html Japanese]
 +
* 3.7.20 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-20.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-20.html Japanese]
 +
* 3.6.27 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-27.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-27.html Japanese]
 +
 
 +
=== pgpoolAdmin 4.2.0 officially released (2021/06/17) ===
 +
 
 +
pgpoolAdmin 4.2.0 officially released.
 +
 
 +
pgpoolAdmin 4.2.0 adds support for Pgpool-II 4.2.
 +
Please take a look at [https://www.pgpool.net/docs/pgpoolAdmin/NEWS release notes].
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
=== Pgpool-II 4.2.3, 4.1.7, 4.0.14, 3.7.19 and 3.6.26 officially released (2021/05/20) ===
 +
 
 +
Pgpool-II 4.2.3, 4.1.7, 4.0.14, 3.7.19 and 3.6.26 officially released.
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.2.3 :  [https://www.pgpool.net/docs/latest/en/html/release-4-2-3.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-2-3.html Japanese]
 +
* 4.1.7 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-7.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-7.html Japanese]
 +
* 4.0.14 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-14.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-14.html Japanese]
 +
* 3.7.19 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-19.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-19.html Japanese]
 +
* 3.6.26 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-26.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-26.html Japanese]
 +
 
 +
=== Pgpool-II 4.2.2, 4.1.6, 4.0.13, 3.7.18 and 3.6.25 officially released (2021/02/18) ===
 +
 
 +
Pgpool-II 4.2.2, 4.1.6, 4.0.13, 3.7.18 and 3.6.25 officially released.
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.2.2 :  [https://www.pgpool.net/docs/latest/en/html/release-4-2-2.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-2-2.html Japanese]
 +
* 4.1.6 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-6.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-6.html Japanese]
 +
* 4.0.13 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-13.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-13.html Japanese]
 +
* 3.7.18 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-18.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-18.html Japanese]
 +
* 3.6.25 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-25.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-25.html Japanese]
 +
 
 +
=== Pgpool-II 4.2.1 released (2020/12/23) ===
 +
 
 +
Pgpool-II 4.2.1 is now released.
 +
 
 +
You can download them from [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.2.1 :  [https://www.pgpool.net/docs/latest/en/html/release-4-2-1.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-2-1.html Japanese]
 +
 
 +
=== Pgpool-II 4.2.0 released (2020/11/26) ===
 +
 
 +
Pgpool-II 4.2.0 is now released.
 +
 
 +
V4.2 contains new features and enhancements, including:
 +
 
 +
* Some items in the configuration file pgpool.conf are vastly enhanced for easier configuration and administration.
 +
 
 +
* Implement logging_collector for easier log management.
 +
 
 +
* Implement log_disconnections to collect disconnection logs.
 +
 
 +
* Implement pg_enc and pg_md5 to allow to register multiple passwords at once.
 +
 
 +
* Allow to show statistics of health check by using SHOW POOL_HEALTH_CHECK_STATS command, and also allow to show statistics of issued SQL by using SHOW POOL_BACKEND_STATS command.
 +
 
 +
* New PCP command pcp_reload_config is added.
 +
 
 +
* Now it is possible to omit write_function_list and read_only_function_list by looking at system catalog information.
 +
 
 +
* Add new clustering mode snapshot_isolation_mode which guarantees not only data modifications to multiple PostgreSQL but read consistency.
 +
 
 +
* Support LDAP authentication between clients and Pgpool-II.
 +
 
 +
* Add ssl_crl_file and ssl_passphrase_command to SSL configuration.
 +
 
 +
* Import PostgreSQL 13's SQL parser.
 +
 
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
Release notes:
 +
[https://www.pgpool.net/docs/42/en/html/release-4-2-0.html English]
 +
 
 +
=== Pgpool-II 4.1.5, 4.0.12, 3.7.17, 3.6.24 and 3.5.28 officially released (2020/11/19) ===
 +
 
 +
Pgpool-II 4.1.5, 4.0.12, 3.7.17, 3.6.24 and 3.5.28 officially released
 +
 
 +
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
* 4.1.5 :  [https://www.pgpool.net/docs/latest/en/html/release-4-1-5.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-1-5.html Japanese]
 +
* 4.0.12 :  [https://www.pgpool.net/docs/latest/en/html/release-4-0-12.html English] [https://www.pgpool.net/docs/latest/ja/html/release-4-0-12.html Japanese]
 +
* 3.7.17 :  [https://www.pgpool.net/docs/latest/en/html/release-3-7-17.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7-17.html Japanese]
 +
* 3.6.24 :  [https://www.pgpool.net/docs/latest/en/html/release-3-6-24.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-6-24.html Japanese]
 +
* 3.5.28 :  [https://www.pgpool.net/docs/latest/en/html/release-3-5-28.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-5-28.html Japanese]
 +
 
 +
=== 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 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) ===
+
=== Pgpool-II 4.1.2, 4.0.9, 3.7.14, 3.6.21 and 3.5.25 officially released (2020/05/21) ===
  
These are the latest stable versions of each major branches.  
+
Pgpool-II 4.1.2, 4.0.9, 3.7.14, 3.6.21 and 3.5.25 officially released
  
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
* 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]
+
* 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]
* 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]
+
* 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]
* 3.3.9:  [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]
+
* 3.7.14 :  [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]
* 3.2.14:  [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]
+
* 3.6.21 :  [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]
* 3.1.17: [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]
+
* 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 3.4.4, 3.3.8, 3.2.13, 3.1.16, and 3.0.20 officially released (2016/02/05) ===
+
=== 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) ===
  
These are the latest stable versions of each major branches.  
+
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 [http://pgpool.net/mediawiki/index.php/Downloads here].
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
* 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]
+
* 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]
* 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]
+
* 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]
* 3.3.8:  [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]
+
* 3.7.13 :  [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]
* 3.2.13:  [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]
+
* 3.6.20 : [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]
* 3.1.16: [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]
+
* 3.5.24 : [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]
* 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]
 
  
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 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 3.5.0 and pgpoolAdmin 3.5.0 officially released (2016/01/29) ===
+
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.
  
Pgpool-II 3.5.0 and pgpoolAdmin 3.5.0 are now officially released.
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
+
=== Pgpool-II 4.1.0 released (2019/10/31) ===
  
 +
Pgpool-II 4.1.0 is now relased.
  
V3.5's new features are:
+
Major enhancements in Pgpool-II 4.1 include:
  
* Improved performance in extended query protocol
+
* Statement level load balancing.
* Overcoming the thundering herd problem
+
* Auto failback.
* watchdog feature enhancements to be more robust and adaptable
+
* Enhance performance in number of areas.
* PCP command enhancements
+
** Shared relation cache allows to reuse relation cache among sessions to reduce internal queries against PostgreSQL system catalogs.
* Import PostgreSQL 9.5 parser
+
** 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.
 
* etc.
  
Please see [http://pgpool.net/mediawiki/index.php?title=pgpool-II_3.5_features&redirect=no this] for details.
+
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]
  
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]
+
=== 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 3.4.3, 3.3.7, 3.2.12, 3.1.15, and 3.0.19 officially released (2015/07/24) ===
+
Pgpool-II 4.0.5, 3.7.10, 3.6.17, 3.5.21 and 3.4.24 officially released
  
These are the latest stable versions of each major branches.  
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
You can download them [http://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]
  
* 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]
+
=== Pgpool-II 4.0.4, 3.7.9, 3.6.16, 3.5.20 and 3.4.23 officially released (2019/03/29) ===
* 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 4.0.4, 3.7.9, 3.6.16, 3.5.20 and 3.4.23 officially released
  
=== pgpool-II 3.4.2, 3.3.6, 3.2.11, 3.1.14, and 3.0.18 officially released (2015/04/08) ===
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
These are the latest stable versions of each major branches.  
+
* 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]
  
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
+
=== Pgpool-II 4.0.3, 3.7.8, 3.6.15, 3.5.19 and 3.4.22 officially released (2019/02/21) ===
  
* 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]
+
Pgpool-II 4.0.3, 3.7.8, 3.6.15, 3.5.19 and 3.4.22 officially released
* 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]
 
  
=== 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) ===
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
These are the latest stable versions of each major branches.  
+
* 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]
  
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
+
=== pgpoolAdmin 4.0.1 officially released (2018/12/20) ===
  
* 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]
+
PgPool Global Development Group has released a Security Update of pgpoolAdmin.
* 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]
+
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.  
  
=== The pgpool-II official yum repository released (2014/12/16) ===
+
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 announced the pgpool-II official yum repository.
+
PgPool Global Development Group would like to thank Fotios Rogkotis
With this repository, you will be able to install or update pgpool-II and pgpoolAdmin etc. by using yum.
+
of DarkMatter for finding the security issue and giving us the  
 +
detailed studies on it.  
  
http://www.pgpool.net/yum/
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
The yum repository currently supports pgpool-II 3.3 or above with RHEL6 x86_64.  
+
=== Pgpool-II 4.0.2, 3.7.7, 3.6.14, 3.5.18 and 3.4.21 officially released (2018/11/22) ===
  
See [[Yum Repository]] for detail.
+
Pgpool-II 4.0.2, 3.7.7, 3.6.14, 3.5.18 and 3.4.21 officially released
  
=== pgpool-II 3.4.0 and pgpoolAdmin 3.4.0 officially released (2014/11/07) ===
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
Pgpool-II 3.4.0 is now officially released.
+
* 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]
  
You can download them [http://pgpool.net/mediawiki/index.php/Downloads 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
  
V3.4's new features are:
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
* Allow fine control of load balancing by using application name or database name
+
* 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]
* New features about log output
+
* 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]
** Allow to print pgpool-II process names
+
* 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]
** Allow to control log verbosity like PostgreSQL
+
* 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]
* SQL parser compatible with PostgreSQL 9.4
+
* 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]
* Import PostgreSQL's memory manager and exception manager
 
* Support IPv6 address
 
* Reorganize source code tree
 
* etc.  
 
  
 +
=== Pgpool-II 4.0.0 and pgpoolAdmin 4.0.0 officially released (2018/10/19) ===
  
* 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]
+
Pgpool-II 4.0.0 and pgpoolAdmin 4.0.0 are now relased.  
  
=== pgpool-II 3.3.4, 3.2.9, 3.1.12, and 3.0.16 are officially released (2014/09/05) ===
+
V4.0 has new features:
  
These are the latest stable versions of each major branches.  
+
* 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 them [http://pgpool.net/mediawiki/index.php/Downloads here].
+
You can download it from [https://pgpool.net/mediawiki/index.php/Downloads here].
  
* 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]
+
Release notes:
* 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]
+
[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]
* 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-ha 2.2 released (2014/04/01) ===
+
=== Pgpool-II 3.7.5, 3.6.12, 3.5.16, 3.4.19 and 3.3.22 officially released (2018/07/31) ===
  
This is the latest stable version.
+
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#pgpool-HA here].
+
You can download them [https://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]
  
=== pgpool-II 3.3.3, 3.2.8, 3.1.11, 3.0.15  and pgpoolAdmin 3.3.1 officially released (2014/03/24) ===
+
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).
  
These are the latest stable versions of each major branches.  
+
=== Pgpool-II 3.7.4, 3.6.11, 3.5.15 and 3.4.18 officially released (2018/06/12) ===
  
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
+
Pgpool-II 3.7.4, 3.6.11, 3.5.15 and 3.4.18 officially released
  
* 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]
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
* 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]
+
* 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 3.2.7, 3.1.10, 3.0.14 officially released (2013/12/06) ===
+
=== Pgpool-II 3.7.3, 3.6.10, 3.5.14, 3.4.17 and 3.3.21 officially released (2018/04/17) ===
  
These are the latest stable versions of each major branches.  
+
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].
+
You can download them [https://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]
+
* 3.7.3 :  [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]
* 3.1.10: [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]
+
* 3.6.10 : [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]
* 3.0.14: [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]
+
* 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 3.3.2 officially released (2013/11/29) ===
+
=== Pgpool-II 3.7.2-2 RPMs are released. (2018/03/14) ===
  
These are the latest stable version of 3.3.
+
Pgpool-II 3.7.2-2 RPMs are released.
  
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
+
You can download them [https://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 3.7.2, 3.6.9, 3.5.13, 3.4.16 and 3.3.20 officially released (2018/02/13) ===
  
=== pgpool-II 3.3.1, 3.2.6, 3.1.9, 3.0.13 officially released (2013/09/06) ===
+
Pgpool-II 3.7.2, 3.6.9, 3.5.13, 3.4.16 and 3.3.20 officially released
  
These are the latest stable versions of each major branches.  
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
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]
  
=== Missing regression test suite in pgpool-II 3.3.0.tar.gz (2013/07/31) ===
+
=== pgpoolAdmin 3.7.1 officially released (2018/02/05) ===
  
New regression test suite was not accidentally included in the pgpool-II 3.3.0.tar.gz tar ball.
+
pgpoolAdmin 3.7.1 is officially released.
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) ===
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
  
Pgpool-II 3.3 is now officially released.
+
[https://www.pgpool.net/docs/pgpoolAdmin/NEWS Release notes]
  
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
+
=== Pgpool-II 3.7.1, 3.6.8, 3.5.12, 3.4.15 and 3.3.19 officially released (2018/01/09) ===
  
V3.3's new features are:
+
Pgpool-II 3.7.1, 3.6.8, 3.5.12, 3.4.15 and 3.3.19 officially released
  
* Enhancements for watchdog
+
You can download them [https://pgpool.net/mediawiki/index.php/Downloads here].
** 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.  
 
  
* [http://www.pgpool.net/docs/pgpool-II-3.3.0/NEWS.txt pgpool-II 3.3 release note (English)]
+
* 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]
* [http://www.pgpool.net/docs/pgpool-II-3.3.0/pgpool-ja.html#release3.3.0 pgpool-II 3.3 release note (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 3.2.5, 3.1.8, 3.0.12 officially released (2013/07/10) ===
+
=== Pgpool-II 3.7.0 and pgpoolAdmin 3.7.0 officially released (2017/11/22) ===
  
These are the latest stable versions of each major branches.  
+
Pgpool-II 3.7.0 and pgpoolAdmin 3.7.0 are now relased.  
  
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
+
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 [https://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
Release notes:
 +
[https://www.pgpool.net/docs/latest/en/html/release-3-7.html English] [https://www.pgpool.net/docs/latest/ja/html/release-3-7.html Japanese]
  
 
== Development ==
 
== Development ==
  
=== pgpool-II 3.5 RC1 released (2016/1/14) ===
+
=== Pgpool-II 4.3 RC1 released (2021/11/25) ===
  
pgpool-II 3.5 RC1 and pgpoolAdmin 3.5 RC1 are now relased. This is not a stable version but just for developers.
+
Pgpool-II 4.3 RC1 is now released. Please take a look at [https://www.pgpool.net/docs/43/en/html/release-4-3rc1.html 4.3 RC1]
  
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
+
Note that this is not a stable version but just for developers.
  
=== pgpool-II 3.5 beta1 released (2015/12/14) ===
+
V4.3 contains new features and enhancements, including:
 +
* A new membership mechanism is introduced to Watchdog to allow to keep quorum/VIP when some of watchdog nodes are removed.
  
pgpool-II 3.5 beta1 and pgpoolAdmin 3.5 beta1 are now relased. This is not a stable version but just for developers.
+
* Allow to choose the least replication delay standby node when selecting the load balance node.  
  
Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.5 better!
+
* Allow to specify the node id to be promoted in pcp_promote_node.  
  
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
+
* Allow to configure to not trigger failover when PostgreSQL is shutdown by admin or killed by pg_terminate_backend.  
  
=== pgpool-II 3.5 alpha1 released (2015/11/16) ===
+
* Add new fields to pcp_proc_info, SHOW POOL_PROCESSES and SHOW POOL_POOLS command to display more useful information to admin.
  
Pgpool-II 3.5 alpha1 is now relased. This is not a stable version but just for developers.
+
* Allow pcp_node_info to list all backend nodes information.
  
V3.5 has a new feature:
+
* Add new fields showing actual PostgreSQL status to SHOW POOL NODES command and friends.
* Improved performance in extended query protocol
+
 
* Overcoming the thundering herd problem
+
* Add a new parameter which represents the recovery source hostname to recovery_1st_stage_command and recovery_2nd_stage_command.
* watchdog feature enhancements to be more robust and adaptable
+
 
* PCP command enhancements
+
* Add support for log time stamp with milliseconds.
* Import PostgreSQL 9.5 parser
+
 
 +
* Import PostgreSQL 14's SQL parser.
 +
 
 +
* Support include directive in pgppol.conf file. You can have separate sub-config file to be included in pgpool.conf.
 +
 
 +
* pgpool.conf sample files are unified into single sample file for easier configuration.
 +
 
 +
* All configuration parameters in pgpool.conf sample file are commented out to clarify which parameter is needed to be changed.
 +
 
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 
 +
Release notes:
 +
[https://www.pgpool.net/docs/43/en/html/release-4-3-0.html English]
 +
 
 +
 
 +
=== Pgpool-II 4.3 beta2 released (2021/11/18) ===
 +
 
 +
Pgpool-II 4.3 beta2 is now released. Please take a look at [https://www.pgpool.net/docs/43/en/html/release-4-3beta2.html 4.3 beta2]
 +
 
 +
Note that this is not a stable version but just for developers.
 +
 
 +
V4.3 contains new features and enhancements, including:
 +
* A new membership mechanism is introduced to Watchdog to allow to keep quorum/VIP when some of watchdog nodes are removed.
 +
 
 +
* Allow to choose the least replication delay standby node when selecting the load balance node.
 +
 
 +
* Allow to specify the node id to be promoted in pcp_promote_node.
 +
 
 +
* Allow to configure to not trigger failover when PostgreSQL is shutdown by admin or killed by pg_terminate_backend.
 +
 
 +
* Add new fields to pcp_proc_info, SHOW POOL_PROCESSES and SHOW POOL_POOLS command to display more useful information to admin.
 +
 
 +
* Allow pcp_node_info to list all backend nodes information.
 +
 
 +
* Add new fields showing actual PostgreSQL status to SHOW POOL NODES command and friends.
 +
 
 +
* Add a new parameter which represents the recovery source hostname to recovery_1st_stage_command and recovery_2nd_stage_command.
 +
 
 +
* Add support for log time stamp with milliseconds.
 +
 
 +
* Import PostgreSQL 14's SQL parser.
 +
 
 +
* Support include directive in pgppol.conf file. You can have separate sub-config file to be included in pgpool.conf.
 +
 
 +
* pgpool.conf sample files are unified into single sample file for easier configuration.
 +
 
 +
* All configuration parameters in pgpool.conf sample file are commented out to clarify which parameter is needed to be changed.
 +
 
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 
 +
Release notes:
 +
[https://www.pgpool.net/docs/43/en/html/release-4-3-0.html English]
 +
 
 +
=== Pgpool-II 4.3 beta1 released (2021/11/09) ===
 +
 
 +
Pgpool-II 4.3 beta1 is now released.
 +
 
 +
Note that this is not a stable version but just for developers.
 +
 
 +
V4.3 contains new features and enhancements, including:
 +
* A new membership mechanism is introduced to Watchdog to allow to keep quorum/VIP when some of watchdog nodes are removed.
 +
 
 +
* Allow to choose the least replication delay standby node when selecting the load balance node.
 +
 
 +
* Allow to specify the node id to be promoted in pcp_promote_node.
 +
 
 +
* Allow to configure to not trigger failover when PostgreSQL is shutdown by admin or killed by pg_terminate_backend.
 +
 
 +
* Add new fields to pcp_proc_info, SHOW POOL_PROCESSES and SHOW POOL_POOLS command to display more useful information to admin.
 +
 
 +
* Allow pcp_node_info to list all backend nodes information.
 +
 
 +
* Add new fields showing actual PostgreSQL status to SHOW POOL NODES command and friends.
 +
 
 +
* Add a new parameter which represents the recovery source hostname to recovery_1st_stage_command and recovery_2nd_stage_command.
 +
 
 +
* Add support for log time stamp with milliseconds.
 +
 
 +
* Import PostgreSQL 14's SQL parser.
 +
 
 +
* Support include directive in pgppol.conf file. You can have separate sub-config file to be included in pgpool.conf.
 +
 
 +
* pgpool.conf sample files are unified into single sample file for easier configuration.
 +
 
 +
* All configuration parameters in pgpool.conf sample file are commented out to clarify which parameter is needed to be changed.
 +
 
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 
 +
Release notes:
 +
[https://www.pgpool.net/docs/43/en/html/release-4-3-0.html English]
 +
 
 +
=== Pgpool-II 4.2 beta1 released (2020/10/27) ===
 +
 
 +
Pgpool-II 4.2 beta1 is now released.
 +
 
 +
Note that this is not a stable version but just for developers.
 +
 
 +
V4.2 contains new features and enhancements, including:
 +
 
 +
* Some items in the configuration file pgpool.conf are vastly enhanced for easier configuration and administration.
 +
 
 +
* Implement logging_collector for easier log management.
 +
 
 +
* Implement log_disconnections to collect disconnection logs.
 +
 
 +
* Implement pg_enc and pg_md5 to allow to register multiple passwords at once.
 +
 
 +
* Allow to show statistics of health check by using SHOW POOL_HEALTH_CHECK_STATS command, and also allow to show statistics of issued SQL by using SHOW POOL_BACKEND_STATS command.
 +
 
 +
* New PCP command pcp_reload_config is added.
 +
 
 +
* Now it is possible to omit write_function_list and read_only_function_list by looking at system catalog information.
 +
 
 +
* Add new clustering mode snapshot_isolation_mode which guarantees not only data modifications to multiple PostgreSQL but read consistency.
 +
 
 +
* Support LDAP authentication between clients and Pgpool-II.
 +
 
 +
* Add ssl_crl_file and ssl_passphrase_command to SSL configuration.
 +
 
 +
* Import PostgreSQL 13's SQL parser.
 +
 
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 
 +
Release notes:
 +
[https://www.pgpool.net/docs/42/en/html/release-4-2-0.html English]
 +
 
 +
=== Pgpool-II 4.2 alpha1 released (2020/10/06) ===
 +
 
 +
Pgpool-II 4.2 alpha1 is now released.
 +
 
 +
Note that this is not a stable version but just for developers.
 +
 
 +
V4.2 contains new features and enhancements, including:
 +
 
 +
* Some items in the configuration file pgpool.conf are vastly enhanced for easier configuration and administration.
 +
 
 +
* Implement logging_collector for easier log management.
 +
 
 +
* Implement log_disconnections to collect disconnection logs.
 +
 
 +
* Implement pg_enc and pg_md5 to allow to register multiple passwords at once.
 +
 
 +
* Allow to show statistics of health check by using SHOW POOL_HEALTH_CHECK_STATS command, and also allow to show statistics of issued SQL by using SHOW POOL_BACKEND_STATS command.
 +
 
 +
* New PCP command pcp_reload_config is added.
 +
 
 +
* Now it is possible to omit write_function_list and read_only_function_list by looking at system catalog information.
 +
 
 +
* Add new clustering mode snapshot_isolation_mode which guarantees not only data modifications to multiple PostgreSQL but read consistency.
 +
 
 +
* Support LDAP authentication between clients and Pgpool-II.
 +
 
 +
* Add ssl_crl_file and ssl_passphrase_command to SSL configuration.
 +
 
 +
* Import PostgreSQL 13's SQL parser.
 +
 
 +
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
 +
 
 +
Release notes:
 +
[https://www.pgpool.net/docs/42/en/html/release-4-2-0.html English]
 +
 
 +
=== Pgpool-II 4.1 RC1 released (2019/10/16) ===
 +
 
 +
Pgpool-II 4.1 RC1 is now released.
 +
 
 +
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 released.
 +
 
 +
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 released.
 +
 
 +
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 released.
 +
 
 +
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 released.
 +
 
 +
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 released.
 +
 
 +
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.
 
* etc.
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
 
  
 +
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 3.3 RC1 released (2013/07/25) ===
+
=== Pgpool-II 3.7 RC1 and pgpoolAdmin 3.7 RC1 released (2017/11/13) ===
  
Pgpool-II 3.3 RC1 is now relased. This is not a stable version but just for developers.
+
Pgpool-II 3.7 RC1 and pgpoolAdmin 3.7 RC1 are now released.  
  
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
+
This is not intended to be used in production but is close to the
 +
release version. So users are encouraged to test it out.
  
=== pgpool-II 3.3 beta1 released (2013/06/12) ===
+
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.
  
Pgpool-II 3.3 beta1 is now relased. This is not a stable version but just for developers.
+
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
  
Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.3 better!
+
Release notes:
 +
[https://www.pgpool.net/docs/pgpool-II-3.7.0/doc/en/html/release-3-7.html English] [https://www.pgpool.net/docs/pgpool-II-3.7.0/doc/ja/html/release-3-7.html Japanese]
  
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
+
=== Pgpool-II 3.7 beta1 released (2017/10/17) ===
  
=== pgpool-II 3.3 alpha1 released (2013/05/17) ===
+
Pgpool-II 3.7 beta1 is now released. This is not a stable version but just for developers.
  
Pgpool-II 3.3 alpha1 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.
  
V3.3 has a new feature:
+
You can download it from [https://pgpool.net/mediawiki/index.php/Developer_releases here].
* 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].
 
  
 
== Old ==
 
== Old ==
 
See [[Old news|this page]].
 
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 (https://www.sraoss.co.jp/index_en.php).

Latest revision as of 04:43, 18 August 2022


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 distributed under a license similar to BSD and MIT. 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: 4.3, 4.2, 4.1, 4.0, 3.7
  • pgpoolAdmin: 4.2, 4.1, 4.0, 3.7

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 4.3.3, 4.2.10, 4.1.13, 4.0.20 and 3.7.25 officially released (2022/08/18)

Pgpool-II 4.3.3, 4.2.10, 4.1.13, 4.0.20 and 3.7.25 officially released.

You can download them here.

Pgpool-II and Log4j (2021/12/14)

Since Pgpool-II is written in C language, it is not affected by Log4j vulnerability.

Also PgpoolAdmin is not affected. It is written in PHP.

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.

Stable

Pgpool-II 4.3.3, 4.2.10, 4.1.13, 4.0.20 and 3.7.25 officially released (2022/08/18)

Pgpool-II 4.3.3, 4.2.10, 4.1.13, 4.0.20 and 3.7.25 officially released.

You can download them here.

Pgpool-II 4.3.2, 4.2.9, 4.1.12, 4.0.19 and 3.7.24 officially released (2022/05/19)

Pgpool-II 4.3.2, 4.2.9, 4.1.12, 4.0.19 and 3.7.24 officially released.

You can download them here.

Pgpool-II 4.3.1, 4.2.8, 4.1.11, 4.0.18 and 3.7.23 officially released (2022/02/17)

Pgpool-II 4.3.1, 4.2.8, 4.1.11, 4.0.18 and 3.7.23 officially released.

You can download them here.

Pgpool-II 4.2.7, 4.1.10, 4.0.17 and 3.7.22 officially released (2021/12/23)

Pgpool-II 4.2.7, 4.1.10, 4.0.17 and 3.7.22 officially released.

The purpose of this release is to provide packages for PostgreSQL 14.

You can download them here.

Pgpool-II 4.3.0 released (2021/12/07)

Pgpool-II 4.3.0 is now released. Please take a look at 4.3.0

V4.3.0 contains new features and enhancements, including:

  • A new membership mechanism is introduced to Watchdog to allow to keep quorum/VIP when some of watchdog nodes are removed.
  • Allow to choose the least replication delay standby node when selecting the load balance node.
  • Allow to specify the node id to be promoted in pcp_promote_node.
  • Allow to configure to not trigger failover when PostgreSQL is shutdown by admin or killed by pg_terminate_backend.
  • Add new fields to pcp_proc_info, SHOW POOL_PROCESSES and SHOW POOL_POOLS command to display more useful information to admin.
  • Allow pcp_node_info to list all backend nodes information.
  • Add new fields showing actual PostgreSQL status to SHOW POOL NODES command and friends.
  • Add a new parameter which represents the recovery source hostname to recovery_1st_stage_command and recovery_2nd_stage_command.
  • Add support for log time stamp with milliseconds.
  • Import PostgreSQL 14's SQL parser.
  • Support include directive in pgppol.conf file. You can have separate sub-config file to be included in pgpool.conf.
  • pgpool.conf sample files are unified into single sample file for easier configuration.
  • All configuration parameters in pgpool.conf sample file are commented out to clarify which parameter is needed to be changed.

You can download it from here.

Release notes: English

Pgpool-II 4.2.6, 4.1.9, 4.0.16, 3.7.21 and 3.6.28 officially released (2021/11/18)

Pgpool-II 4.2.6, 4.1.9, 4.0.16, 3.7.21 and 3.6.28 officially released.

You can download them here.

Pgpool-II 4.2.5 released (2021/09/14)

Pgpool Global Development Group is pleased to announce the availability of Pgpool-II 4.2.5.

You can download them here.

Pgpool-II 4.2.4, 4.1.8, 4.0.15, 3.7.20 and 3.6.27 officially released (2021/08/05)

Pgpool-II 4.2.4, 4.1.8, 4.0.15, 3.7.20 and 3.6.27 officially released.

You can download them here.

pgpoolAdmin 4.2.0 officially released (2021/06/17)

pgpoolAdmin 4.2.0 officially released.

pgpoolAdmin 4.2.0 adds support for Pgpool-II 4.2. Please take a look at release notes.

You can download them here.

Pgpool-II 4.2.3, 4.1.7, 4.0.14, 3.7.19 and 3.6.26 officially released (2021/05/20)

Pgpool-II 4.2.3, 4.1.7, 4.0.14, 3.7.19 and 3.6.26 officially released.

You can download them here.

Pgpool-II 4.2.2, 4.1.6, 4.0.13, 3.7.18 and 3.6.25 officially released (2021/02/18)

Pgpool-II 4.2.2, 4.1.6, 4.0.13, 3.7.18 and 3.6.25 officially released.

You can download them here.

Pgpool-II 4.2.1 released (2020/12/23)

Pgpool-II 4.2.1 is now released.

You can download them from here.

Pgpool-II 4.2.0 released (2020/11/26)

Pgpool-II 4.2.0 is now released.

V4.2 contains new features and enhancements, including:

  • Some items in the configuration file pgpool.conf are vastly enhanced for easier configuration and administration.
  • Implement logging_collector for easier log management.
  • Implement log_disconnections to collect disconnection logs.
  • Implement pg_enc and pg_md5 to allow to register multiple passwords at once.
  • Allow to show statistics of health check by using SHOW POOL_HEALTH_CHECK_STATS command, and also allow to show statistics of issued SQL by using SHOW POOL_BACKEND_STATS command.
  • New PCP command pcp_reload_config is added.
  • Now it is possible to omit write_function_list and read_only_function_list by looking at system catalog information.
  • Add new clustering mode snapshot_isolation_mode which guarantees not only data modifications to multiple PostgreSQL but read consistency.
  • Support LDAP authentication between clients and Pgpool-II.
  • Add ssl_crl_file and ssl_passphrase_command to SSL configuration.
  • Import PostgreSQL 13's SQL parser.

You can download it from here.

Release notes: English

Pgpool-II 4.1.5, 4.0.12, 3.7.17, 3.6.24 and 3.5.28 officially released (2020/11/19)

Pgpool-II 4.1.5, 4.0.12, 3.7.17, 3.6.24 and 3.5.28 officially released

You can download them here.

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

Development

Pgpool-II 4.3 RC1 released (2021/11/25)

Pgpool-II 4.3 RC1 is now released. Please take a look at 4.3 RC1

Note that this is not a stable version but just for developers.

V4.3 contains new features and enhancements, including:

  • A new membership mechanism is introduced to Watchdog to allow to keep quorum/VIP when some of watchdog nodes are removed.
  • Allow to choose the least replication delay standby node when selecting the load balance node.
  • Allow to specify the node id to be promoted in pcp_promote_node.
  • Allow to configure to not trigger failover when PostgreSQL is shutdown by admin or killed by pg_terminate_backend.
  • Add new fields to pcp_proc_info, SHOW POOL_PROCESSES and SHOW POOL_POOLS command to display more useful information to admin.
  • Allow pcp_node_info to list all backend nodes information.
  • Add new fields showing actual PostgreSQL status to SHOW POOL NODES command and friends.
  • Add a new parameter which represents the recovery source hostname to recovery_1st_stage_command and recovery_2nd_stage_command.
  • Add support for log time stamp with milliseconds.
  • Import PostgreSQL 14's SQL parser.
  • Support include directive in pgppol.conf file. You can have separate sub-config file to be included in pgpool.conf.
  • pgpool.conf sample files are unified into single sample file for easier configuration.
  • All configuration parameters in pgpool.conf sample file are commented out to clarify which parameter is needed to be changed.

You can download it from here.

Release notes: English


Pgpool-II 4.3 beta2 released (2021/11/18)

Pgpool-II 4.3 beta2 is now released. Please take a look at 4.3 beta2

Note that this is not a stable version but just for developers.

V4.3 contains new features and enhancements, including:

  • A new membership mechanism is introduced to Watchdog to allow to keep quorum/VIP when some of watchdog nodes are removed.
  • Allow to choose the least replication delay standby node when selecting the load balance node.
  • Allow to specify the node id to be promoted in pcp_promote_node.
  • Allow to configure to not trigger failover when PostgreSQL is shutdown by admin or killed by pg_terminate_backend.
  • Add new fields to pcp_proc_info, SHOW POOL_PROCESSES and SHOW POOL_POOLS command to display more useful information to admin.
  • Allow pcp_node_info to list all backend nodes information.
  • Add new fields showing actual PostgreSQL status to SHOW POOL NODES command and friends.
  • Add a new parameter which represents the recovery source hostname to recovery_1st_stage_command and recovery_2nd_stage_command.
  • Add support for log time stamp with milliseconds.
  • Import PostgreSQL 14's SQL parser.
  • Support include directive in pgppol.conf file. You can have separate sub-config file to be included in pgpool.conf.
  • pgpool.conf sample files are unified into single sample file for easier configuration.
  • All configuration parameters in pgpool.conf sample file are commented out to clarify which parameter is needed to be changed.

You can download it from here.

Release notes: English

Pgpool-II 4.3 beta1 released (2021/11/09)

Pgpool-II 4.3 beta1 is now released.

Note that this is not a stable version but just for developers.

V4.3 contains new features and enhancements, including:

  • A new membership mechanism is introduced to Watchdog to allow to keep quorum/VIP when some of watchdog nodes are removed.
  • Allow to choose the least replication delay standby node when selecting the load balance node.
  • Allow to specify the node id to be promoted in pcp_promote_node.
  • Allow to configure to not trigger failover when PostgreSQL is shutdown by admin or killed by pg_terminate_backend.
  • Add new fields to pcp_proc_info, SHOW POOL_PROCESSES and SHOW POOL_POOLS command to display more useful information to admin.
  • Allow pcp_node_info to list all backend nodes information.
  • Add new fields showing actual PostgreSQL status to SHOW POOL NODES command and friends.
  • Add a new parameter which represents the recovery source hostname to recovery_1st_stage_command and recovery_2nd_stage_command.
  • Add support for log time stamp with milliseconds.
  • Import PostgreSQL 14's SQL parser.
  • Support include directive in pgppol.conf file. You can have separate sub-config file to be included in pgpool.conf.
  • pgpool.conf sample files are unified into single sample file for easier configuration.
  • All configuration parameters in pgpool.conf sample file are commented out to clarify which parameter is needed to be changed.

You can download it from here.

Release notes: English

Pgpool-II 4.2 beta1 released (2020/10/27)

Pgpool-II 4.2 beta1 is now released.

Note that this is not a stable version but just for developers.

V4.2 contains new features and enhancements, including:

  • Some items in the configuration file pgpool.conf are vastly enhanced for easier configuration and administration.
  • Implement logging_collector for easier log management.
  • Implement log_disconnections to collect disconnection logs.
  • Implement pg_enc and pg_md5 to allow to register multiple passwords at once.
  • Allow to show statistics of health check by using SHOW POOL_HEALTH_CHECK_STATS command, and also allow to show statistics of issued SQL by using SHOW POOL_BACKEND_STATS command.
  • New PCP command pcp_reload_config is added.
  • Now it is possible to omit write_function_list and read_only_function_list by looking at system catalog information.
  • Add new clustering mode snapshot_isolation_mode which guarantees not only data modifications to multiple PostgreSQL but read consistency.
  • Support LDAP authentication between clients and Pgpool-II.
  • Add ssl_crl_file and ssl_passphrase_command to SSL configuration.
  • Import PostgreSQL 13's SQL parser.

You can download it from here.

Release notes: English

Pgpool-II 4.2 alpha1 released (2020/10/06)

Pgpool-II 4.2 alpha1 is now released.

Note that this is not a stable version but just for developers.

V4.2 contains new features and enhancements, including:

  • Some items in the configuration file pgpool.conf are vastly enhanced for easier configuration and administration.
  • Implement logging_collector for easier log management.
  • Implement log_disconnections to collect disconnection logs.
  • Implement pg_enc and pg_md5 to allow to register multiple passwords at once.
  • Allow to show statistics of health check by using SHOW POOL_HEALTH_CHECK_STATS command, and also allow to show statistics of issued SQL by using SHOW POOL_BACKEND_STATS command.
  • New PCP command pcp_reload_config is added.
  • Now it is possible to omit write_function_list and read_only_function_list by looking at system catalog information.
  • Add new clustering mode snapshot_isolation_mode which guarantees not only data modifications to multiple PostgreSQL but read consistency.
  • Support LDAP authentication between clients and Pgpool-II.
  • Add ssl_crl_file and ssl_passphrase_command to SSL configuration.
  • Import PostgreSQL 13's SQL parser.

You can download it from here.

Release notes: English

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

Pgpool-II 4.1 RC1 is now released.

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 released.

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 released.

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 released.

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 released.

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 released.

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 released.

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 released. 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.

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 (https://www.sraoss.co.jp/index_en.php).