X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (mx1.hub.org [200.46.208.251]) by postgresql.org (Postfix) with ESMTP id 7064111F623F for ; Mon, 24 Apr 2006 18:05:52 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.208.251]) (amavisd-new, port 10024) with ESMTP id 00204-01-9 for ; Mon, 24 Apr 2006 18:05:11 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from noel.decibel.org (noel.decibel.org [67.100.216.10]) by postgresql.org (Postfix) with ESMTP id F082E11F6D19 for ; Mon, 24 Apr 2006 18:00:19 -0300 (ADT) Received: by noel.decibel.org (Postfix, from userid 1001) id 5DF1056423; Mon, 24 Apr 2006 16:00:19 -0500 (CDT) Received: (hashcash-sendmail, from uid 1001); Mon, 24 Apr 2006 16:00:18 -0500 Date: Mon, 24 Apr 2006 16:00:18 -0500 From: "Jim C. Nasby" To: Richard Broersma Jr Cc: Bruno Almeida do Lago , 'Tom Lane' , pgsql-performance@postgresql.org Subject: Re: GROUP BY Vs. Sub SELECT Message-ID: <20060424210017.GM48010@pervasive.com> References: <444ce266.1ca74910.7370.ffffe386@mx.gmail.com> <20060424190739.82273.qmail@web31812.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060424190739.82273.qmail@web31812.mail.mud.yahoo.com> X-Operating-System: FreeBSD 6.0-RELEASE-p4 amd64 X-Distributed: Join the Effort! http://www.distributed.net User-Agent: Mutt/1.5.11 X-Hashcash: 1:20:060424:rabroersma@yahoo.com::GbZilHyem5eevMKW:00000000000000000 0000000000000000000000006FBy X-Hashcash: 1:20:060424:teolupus@gmail.com::VmZ2daQVkbWbnTmo:0000000000000000000 0000000000000000000000003mzf X-Hashcash: 1:20:060424:tgl@sss.pgh.pa.us::lRw0QxEgGU6WGAOk:00000000000000000000 0000000000000000000000002hLC X-Hashcash: 1:20:060424:pgsql-performance@postgresql.org::lPumJsc6E1O1WLa9:00000 0000000000000000000000003+kE X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200604/530 X-Sequence-Number: 18614 On Mon, Apr 24, 2006 at 12:07:39PM -0700, Richard Broersma Jr wrote: > > > I'd like to get more info on EXPLAIN ANALYZE output... where can I read more > > about it? > > I believe this link has what you are looking for: > http://www.postgresql.org/docs/8.1/interactive/performance-tips.html http://www.pervasive-postgres.com/lp/newsletters/2006/Insights_postgres_Apr.asp#4 might also be worth your time to read... -- Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461