On Mon, 2008-06-09 at 11:49 -0400, Tom Lane wrote: > Mark Cave-Ayland <[EMAIL PROTECTED]> writes: > > So by adding in an extra function around the subselect result, we have > > speeded up the index lookup by several orders of magnitude, and the > > speedup appears to be coming from somewhere within the index scan?! > > Is the value you are fetching from the geography table large enough to > be toasted? I'm thinking you might be looking at the cost of repeated > de-toastings.
So you are saying it is de-toasted 32880 times, in this case? If not, where are the repeated de-toastings happening? Sounds like we need some stats on how well toast is working for us. -- Simon Riggs www.2ndQuadrant.com PostgreSQL Training, Services and Support -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
