All, I have a recently-migrated Pg cluster running 8.4.7 on Red Hat Enterprise Linux Client release 5.7 (Tikanga) in a VMware VM that is logging the subject warning. The application code is considerably old (deployed back in the 7.4 days, I believe) and the message is preceded by a call to select user_write_unlock(), which is a simple wrapper query that calls pg_advisory_unlock(). What are the causes and possible problems and side-effects of receiving such a log warning? Thank you for any assistance you can provide. -- Gary Chambers -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general