Ian Westmacott wrote: > On Tue, 2008-04-29 at 17:12 -0400, Alvaro Herrera wrote: > > Can you verify whether age(pg_database.datfrozenxid) is shrinking after > > vacuuming? If the age() of a database is higher than the applicable > > max_freeze_age, then it will always be chosen. > > One of the databases is about 1.5TB, so that could take a while. > Anything else I could look at in the meantime? The age of these > databases right now is about 290039577. Also, autovacuum doesn't always > choose the same DB, it alternates between template1 and one of mine -- > going back through a couple of months of logs I don't see it ever > choosing the same one twice in a row.
Right -- if you have two databases over the wraparound edge, it will alternate between them. I still think that the autovac is dying before completing the task. Did you investigate whether there are "ERROR" messages coming from autovacuum? No PG crashes would happen. -- Alvaro Herrera http://www.CommandPrompt.com/ PostgreSQL Replication, Consulting, Custom Development, 24x7 support -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
