Le 2012-08-10 à 07:53, Laszlo Fogas a écrit : > We are running Postgres 8.3 on our production servers on Amazon EC2. > > We have a reoccurring problem of slowness initially in every 2 months, after enabling autovacuum every 6 months what only full vacuum can solve. It's kind of a problem as it requires 2hrs downtime and we want to avoid that. What we are doing now is moving to Postgres 9.1 as a desperate measure, but we would like to understand better the root cause of the problem. The usual solution is to run autovacuum *more* frequently, not less. It's not perfectly clear, but you say "after enabling autovacuum every 6 months". If that's the case, then it's much too long. autovacuum should be running hourly, if not more often. http://wiki.postgresql.org/wiki/Tuning_Your_PostgreSQL_Server#autovacuum_max_fsm_pages.2C_max_fsm_relations talks about running more frequently. Hope that helps! François Beausoleil - Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
