On Tue, Aug 18, 2009 at 11:44 AM, Anj Adu<fotographs@xxxxxxxxx> wrote: > We have a partitioned table structure where the partitions are created > on a daily basis. One of the inserts into the daily partition failed > (crashed) ..the partition was empty after the crash. We did a vacuum > of the partition and it takes very long (over 30 minutes). > > Postgres 8.1.2 ... vacuum_cost_delay = 0. You need an update. You're missing years and years of bug fixes with that version. > What is vacuum doing that takes so long on an empty table? Deleting tuples that aren't there. You're probably better off using truncate: begin; trunctate only partition_table; commit; It's much faster. The begin / commit pair are just in case you do it to the wrong table you can get your data back replacing commit with rollback. -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
