> I have a dynamically built query that will periodically(2 times a day and becoming more frequent) make my server totally unresponsive. does this query involve more than geqo_threshold (default 12) tables? If so, this most probably is geqo (genetic query optimizer) kicking in. Try to fiddle with some geqo parameters (raising geqo_effort is the first choice). Greetings Marcin -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general