Tom Lane wrote: > Ofer Israeli <oferi@xxxxxxxxxxxxxx> writes: >> During our testing we see that the table size increases >> substantially. When looking at the autovacuum log, set with default >> configuration, it seems that it ran for around 60 seconds (see below >> and note that this was a 1-minute test, i.e. only 100 updates)! > > autovacuum is intended to run fairly slowly, so as to not consume too > much resources. If you think it's too slow you can adjust the > autovacuum_cost tunables. > >> When setting a higher cost for the autovacuum, tried values of 2000, >> it ran for even longer: ~400 seconds! > > That's the wrong direction, no? The settings we used were not in the postgresql.conf file, but rather an update of the pg_autovacuum table where we set the vac_cost_limit to 2000. The reason for this being that we wanted this definition only for the big (TOASTed) table I was referring to. The logged settings in the ~400 second case were: autovac_balance_cost(pid=6224 db=16385, rel=17881, cost_limit=10, cost_delay=1) Which comes as quite a surprise as it seems that the cost_limit is not set or am I missing something? Thanks, Ofer -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
