> -----Original Message----- > From: johnnnnnn [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, January 07, 2003 3:33 PM > To: [EMAIL PROTECTED] > Subject: Re: [GENERAL] [HACKERS] I feel the need for speed. > What am I doing wrong? > > > On Tue, Jan 07, 2003 at 03:10:06PM -0800, Dann Corbit wrote: > > NOTICE: QUERY PLAN: > > > > SetOp Except (cost=202028537.97..202120623.90 rows=1227812 > width=24) > > -> Sort (cost=202028537.97..202028537.97 rows=12278124 width=24) > > -> Append (cost=100000000.00..200225099.24 rows=12278124 > > width=24) > > -> Subquery Scan *SELECT* 1 > > (cost=100000000.00..100112549.62 rows=6139062 width=24) > > -> Seq Scan on CNX_DS_53_SIS_STU_OPT_FEE_TB a > > (cost=100000000.00..100112549.62 rows=6139062 width=24) > > -> Subquery Scan *SELECT* 2 > > (cost=100000000.00..100112549.62 rows=6139062 width=24) > > -> Seq Scan on CNX_DS2_53_SIS_STU_OPT_FEE_TB b > > (cost=100000000.00..100112549.62 rows=6139062 width=24) > > > > EXPLAIN > > Those big round numbers suggest that you haven't run vacuum > analyze on all of your tables. Since PostgreSQL uses a > cost-based optimizer, you do actually have to give it some > idea of what things will cost before it can give you an > appropriate plan. > > Reference for your version: > http://www14.us.postgresql.org/users-lounge/docs/7.1/reference /sql-vacuum.html
No analyze for 7.1.3. Just ran vacuum a few minutes before the query. No boost at all. Even with SET enable_seqscan = 0 it still does a table scan. ---------------------------(end of broadcast)--------------------------- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
