Received: from localhost (maia-5.hub.org [200.46.204.182]) by postgresql.org (Postfix) with ESMTP id 4FACE9FBF0B for ; Wed, 20 Jun 2007 13:01:25 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.182]) (amavisd-maia, port 10024) with ESMTP id 00297-03 for ; Wed, 20 Jun 2007 13:01:19 -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 B55099FBF06 for ; Wed, 20 Jun 2007 13:01:17 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.1/8.14.1) with ESMTP id l5KG1Gtx018953; Wed, 20 Jun 2007 12:01:16 -0400 (EDT) To: "Mikko Partio" cc: pgsql-performance@postgresql.org Subject: Re: Slow indexscan In-reply-to: <2ca799770706200855w1a6b6a7cy8526b9be0ef9c97c@mail.gmail.com> References: <2ca799770706200702y1074f066s61279b67f93315d0@mail.gmail.com> <17907.1182352197@sss.pgh.pa.us> <2ca799770706200855w1a6b6a7cy8526b9be0ef9c97c@mail.gmail.com> Comments: In-reply-to "Mikko Partio" message dated "Wed, 20 Jun 2007 18:55:56 +0300" Date: Wed, 20 Jun 2007 12:01:16 -0400 Message-ID: <18952.1182355276@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200706/424 X-Sequence-Number: 25457 "Mikko Partio" writes: > Adding a new index does not speed up the query (although the planner decides > to use the index): Hm. Lots of dead rows maybe? What's your vacuuming policy? regards, tom lane