On Wed, Dec 17, 2008 at 09:47:23AM -0500, Tom Lane wrote: > "John Lister" <john.lister...@kickstone.com> writes: > > Cheers for the quick reply. I've tweaked them quite a bit, but we have > > quite > > a few heavily updated tables that i'd like vacuuming to keep them in check. > > Unfortunately the autovacuum does a FULL vacuum every so often locking the > > tables for quite a long time, i'd like to move these to the evening if > > possible. > > Huh? Autovacuum *never* does VACUUM FULL.
Perhaps autovacuum is shrinking the table after finding lots of empty pages at the end, as in what VACUUM VERBOSE is logging here: INFO: "foo": truncated 11944384 to 8877366 pages I think this acquires an AccessExclusiveLock. I've seen this take hours in the case of a table with a lot of empty pages. -- Michael Fuhr -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
