On Fri, Jul 13, 2012 at 3:22 PM, Eoghan Murray <eog...@qatano.com> wrote: > This is with `enable_material=off`, with `enable_material=on` it also > doesn't go for the Merge Join, but the Materialize step pushes it up to over > 7,000ms.
I think this one could stem from what Tom observed, that the rowcount estimate is way off. It usually helps a great deal if you can get PG to estimate correctly, be it by doing analyze, incrementing statistics or simply formulating your query in a way that's friendlier for PG's estimator. -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
