Next time this is happening join the pg_lock table to the pg_stat_activity table to see which query is holding the lock for a bazillion milliseconds, while it's happening. That query / statement may give you some clue what's wrong.
-- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
