On Mon, Oct 27, 2008 at 05:23:37PM -0700, David Rees wrote: > However, occasionally, processing time will jump up significantly - > the average processing time is around 20ms with the maximum processing > time taking 2-4 seconds for a small percentage of transactions. Ouch! > > Turning on statement logging and analyzing the logs of the application > itself shows that step #4 is the culprit of the vast majority of the > slow transactions. My bet is that you're waiting on checkpoints. Given that you're on 8.3, start fiddling with the checkpoint_completion_target parameter. 0.7 might help. A -- Andrew Sullivan ajs@xxxxxxxxxxxxxxxxx +1 503 667 4564 x104 http://www.commandprompt.com/ -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
