The only issue I have with autovacuum is the fact that I have to briefly stop/restart postgres every couple of days, which kills autovacuum and it has no memory of previous work done. I work with several databases with partitioned tables having high daily volume. Dropping partitioned tables locks out jdbc inserts and the drop command itself goes into a WAIT state. Hence, I have to stop postgres,update pg_hba.conf to prevent access,restart postgres,drop tables and update pg_hba to allow access(Crazy, but I have no choice because Postgres deadlocks on drop child tables while inserts happen on the parent) -----Original Message----- From: Matthew T. O'Connor [mailto:matthew@xxxxxxxx] Sent: Thursday, September 28, 2006 9:22 PM To: Sriram Dandapani Cc: pgsql-admin@xxxxxxxxxxxxxx Subject: Re: [ADMIN] autovacuum ignore tables Sriram Dandapani wrote: > > If I were to specify in the pg_autovacuum catalog that certain high > volume partitioned tables(that get dropped daily) be ignored, then > when autovacuum finishes, will it update the transaction id wraparound > counter (this way, I can get autovacuum to finish quickly ) > > OR > > Will I still need to periodically do vacuumdb -a to take care of the > wraparound problem. > You don't need to do a manual vacuumdb -a since autovacuum will do this once it decides you are getting too close to the wraparound point. I believe this has been improved in the upcoming 8.2 release where autovacuum no longer need to vacuum the whole database at once, rather XID wraparound is now tracked on a per table basis.
