Matthew Churcher <matthew.churcher@xxxxxxxxxxx> writes: > I've tried cursor_tuple_fraction values as low as 0.0000000001 which by my reckoning should be low enough and also 0 but the planner is still selecting seqscan-and-sort. Hm. Keep in mind that plpgsql caches query plans, so if you're examining this by checking the runtime of the function you showed, you'd need to start a fresh session, set cursor_tuple_fraction, then try the function to be sure you were seeing the effects of the parameter change. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general