I also found this. Perhaps it is related? http://postgresql.1045698.n5.nabble.com/Hash-Aggregate-plan-picked-for-very-large-table-out-of-memory-td1883299.html
-- Jon -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
