[pgpool-general: 7901] Re: PGPool Load Balancing [EXTERNAL] [SEC=UNOFFICIAL]
Mark Schloss
Mark.Schloss at austrac.gov.au
Fri Nov 26 14:00:09 JST 2021
UNOFFICIAL
Hi Luca and Tatsuo,
Thank you both for your replies. pcp_attach_node resolved the issue. I wasn't aware the node state was recorded in the status file - the first time I started the 4.2 configuration I had a mistake in the config file in that the standby server details were commented. I thought uncommenting would be enough - lesson learnt!.
Regards
Mark
UNOFFICIAL
-----Original Message-----
From: Tatsuo Ishii <ishii at sraoss.co.jp>
Sent: Thursday, 25 November 2021 4:34 PM
To: Mark Schloss <Mark.Schloss at austrac.gov.au>
Cc: pgpool-general at pgpool.net
Subject: Re: [pgpool-general: 7892] PGPool Load Balancing [SEC=UNOFFICIAL] [EXTERNAL]
> UNOFFICIAL
>
> Hi,
>
> I am preparing for an upgrade from 4.1.4 to 4.2.5 and have installed
> the new version in our test environment. After making the necessary
> configuration changes required for the upgrade I am finding the load
> balancing does not seem to be working - the standby database is not
> shown as the load balance node and queries are all serviced by the
> primary. Our setup is one primary database and one standby with
> streaming replication. I have set the following -
>
> load_balance_mode = on
> disable_load_balance_on_write = 'transaction'
>
> The output of show pool_nodes is
>
> node_id | hostname | port | status | lb_weight | role | select_cnt | load_balance_node | replication_delay | replication_state | replication_sync_state | last_status_change
> ---------+----------+------+--------+-----------+---------+------------+-------------------+-------------------+-------------------+------------------------+---------------------
> 0 | xxxx | 5432 | up | 0.500000 | primary | 18 | true | 0 | | | 2021-11-24 15:33:12
> 1 | xxxxxxx | 5432 | unused | 0.500000 | standby | 0 | false | 0 | | | 2021-11-24 15:33:12
> (2 rows)
Looks like the initial pgpool_status for node 1 is down or unused, and pgpool was started without -D option. You can try pcp_attach_node command to let pgpool recognize node 1 is working.
Best reagards,
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese:http://www.sraoss.co.jp
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