I wonder if it would be helpful to restart the database, then begin gathering information pg_locks while it can still respond to queries. I speculate that this is possible because the amount of memory needed to query pg_locks continues to grow (around 1900MB now). Dave Owens -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance