[pgpool-general: 3291] Re: High load, low CPU usage since 3.3.4

Tatsuo Ishii ishii at postgresql.org
Tue Nov 18 09:49:55 JST 2014

pgpool-II changes watchdog functionality between 3.2 and 3.3. I don't
what is your actual configuration (you only showed old configuration
contents, you should use "show pool_status" to display actual
settings) but I suspect this is because of the changes in
watchdog. Can you try to turn off watchdog and how the load average

Best regards,
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php

> Hi all,
> Recently upgraded a production system from 3.2.4-2.1 to 3.3.4-1 (both backported Debian packages). With 3.2.4 the cpu usage was ~10% (8 cores), and load ~0.1. After upgrade, without any changes to configuration, cpu usage is the same, however, system load is now about 10.0 (5min. average). Only similar report i could find is from 2012:
> http://www.sraoss.jp/pipermail/pgpool-general/2012-July/000827.html
> This suggests the issue was resolved in 3.1-stable, so this is probably another issue we’re facing. Some more info;
> - PGpool runs on dedicated hosts, in failover (watchdog) setup
> - PGpool nodes have been upgrade from Debian squeeze to wheezy, while upgrading from 3.2.3 to 3.3.4
> - No changes (configuration and/or updates) on backend (postgresql) nodes
> - The load does not seem to affect functionality in any way (not in the application and neither in pcp commands or responsiveness)
> - No changes in (use of) system resources are noticeable; no processes in IOwait, not more (or less) connections / changes in state of connections to/from pgpool)
> I’ve attached our PGpool settings. Any ideas?
> Thanks!

More information about the pgpool-general mailing list