Josh Berkus <josh@xxxxxxxxxxxx> writes: > Just got this simple case off IRC today: > [ hashed versus non-hashed subplan ] > I'm at a bit of a loss as to what's happening here. Possibly work_mem is smaller in the second installation? (If I'm counting on my fingers right, you'd need a setting of at least a couple MB to let it choose a hashed subplan for this case.) regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance