Hi Jens, Thanks for answer. One more question: Can the manual VACUUM operate on database where there are long lasting transactions? In other words, do I need to restart the server or kill long lasting transactions in order to allow manual VACUUM to clear old XIDs? Regards, Pawel -- View this message in context: http://postgresql.1045698.n5.nabble.com/autovacuum-and-transaction-id-wraparound-tp5545412p5549786.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general