On 2014-08-27 11:05:52 +0200, Fabien COELHO wrote: > I can test a couple of patches. I already did one on someone advice (make > bgwriter round all stuff in 1s instead of 120s, without positive effect.
I've quickly cobbled together the attached patch (which at least doesn't seem to crash & burn). It tries to trigger pages being flushed out during the paced phase of checkpoints instead of the fsync phase. The sync_on_checkpoint_flush can be used to enable/disable that behaviour. I'd be interested to hear whether that improves your latency numbers. I unfortunately don't have more time to spend on this right now :(. Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
