Joseph S wrote: > I'm running 8.2.6. I have a log table that is always INSERTed to, and > no updates or deletes are ever run on. For some reason the autovacuum > decided it needed to vacuum this table, and it is slowing down my > production server. Perhaps it's because the table is close to Xid wraparound. Please see select age(relfrozenxid) from pg_class where oid = 'your-table'::regclass; If the age exceeds max freeze age, then this is the cause. (The freeze max age can come from the freeze_max_age param, or autovacuum_freeze_max_age, or pg_autovacuum.freeze_max_age). Hmm, maybe it's called max_freeze_age, I don't recall offhand. Beware of the pg_autovacuum column being zero. -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc.
