Received: from localhost (maia-4.hub.org [200.46.204.183]) by postgresql.org (Postfix) with ESMTP id 5A80C9FBB14 for ; Fri, 23 Mar 2007 19:22:45 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-new, port 10024) with ESMTP id 73522-10 for ; Fri, 23 Mar 2007 19:22:43 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.4 Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by postgresql.org (Postfix) with ESMTP id 25E549FBADE for ; Fri, 23 Mar 2007 19:22:41 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.13.6/8.13.6) with ESMTP id l2NMMdSj025809; Fri, 23 Mar 2007 18:22:39 -0400 (EDT) To: "Noah M. Daniels" cc: pgsql-performance@postgresql.org Subject: Re: Strange left outer join performance issue In-reply-to: <797C9FCF-8C8C-4813-8979-68DF7B70FFF8@mac.com> References: <5335C295-4D3E-4A1B-A270-6B822377DD25@mac.com> <25685.1174688032@sss.pgh.pa.us> <797C9FCF-8C8C-4813-8979-68DF7B70FFF8@mac.com> Comments: In-reply-to "Noah M. Daniels" message dated "Fri, 23 Mar 2007 18:18:34 -0400" Date: Fri, 23 Mar 2007 18:22:39 -0400 Message-ID: <25808.1174688559@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200703/380 X-Sequence-Number: 23785 "Noah M. Daniels" writes: > You're right; this is postgres 8.0.8. Perhaps upgrading will solve > this issue. Is there any way to get this query to perform better in > postgres 8.0.8? You could try reducing random_page_cost, but I'm not sure that will help much. regards, tom lane