Stefan Kaltenbrunner wrote:
> I'm still getting random failures from some of my buildfarm members
> which is starting to get a bit irritating and annoying :-(
> some recent failures:
> any ideas ?

Since they are sporadic, my guess is that it's due to autovacuum not
letting pgstat catch up.  I'd try either setting
autovacuum_vacuum_cost_delay to a low value, or extending the sleep
period in the stats test, to give more time for pgstat to catch up with
those messages.

Setting the cost_delay sounds a reasonable thing to do anyway, and in
fact I already proposed it and nobody objected (AFAIR).  Now we only
have to agree on a reasonable value.

Alvaro Herrera                      
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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