> select age(datfrozenxid) from pg_database where datname = 'your database' > > 2 billions and you are screwed. Autovacuum starts panicking way before > that, to have enough slack. dbname=# select age(datfrozenxid) from pg_database where datname = 'dbname'; age ------------ 1648762992 (1 row) Sooo... looks like time to quickly upgrade to 8.1 head. Thanks for the help, Csaba.