> > ... So contents of database changes very fast. Problem is that when > > pg_autovacuum does vacuum those changes slows down too much. > > The "vacuum cost" parameters can be adjusted to make vacuums fired > by pg_autovacuum less of a burden. I haven't got any specific numbers > to suggest, but perhaps someone else does.
It looks like that not only vacuum causes our problems. vacuum_cost seems to lower vacuum impact but we are still noticing slow queries "storm". We are logging queries that takes >2000ms to process. And there is quiet periods and then suddenly 30+ slow queries appears in log within the same second. What else could cause such behaviour? WAL log switch? One WAL file seems to last <1 minute. And also in slow queries log only function call is shown. Maybe it is possible to get exact query which slows everything down in the serverlog? Thanks, Mindaugas ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
