Grzegorz JaÅkiewicz wrote: > you're joining on more than one key. That always hurts performance. That's very clearly *not* the problem, as there is a plan which runs in acceptable time but the optimizer is not choosing without being coerced. (1) Virtually every query we run joins on multi-column keys, yet we have good performance except for this one query. (2) We're talking about a performance regression due to a new release picking a newly available plan which it wrongly estimates to be an order of magnitude faster, when it's actually more than five times slower. -Kevin -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
