Received: from localhost (unknown [200.46.204.182]) by postgresql.org (Postfix) with ESMTP id 7D6E29FB44C for ; Tue, 16 Oct 2007 12:30:36 -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 56723-04-2 for ; Tue, 16 Oct 2007 12:30:27 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.5 Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by postgresql.org (Postfix) with ESMTP id CD6059FB6EF for ; Tue, 16 Oct 2007 12:30:32 -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 l9GFUVGu017052; Tue, 16 Oct 2007 11:30:31 -0400 (EDT) To: =?ISO-8859-1?Q?St=E9phane_Schildknecht?= cc: "pgsql-performance@postgresql.org" Subject: Re: Vacuum goes worse In-reply-to: <4714D817.30701@postgresqlfr.org> References: <47147AD8.9010704@postgresqlfr.org> <15640.1192544768@sss.pgh.pa.us> <4714D817.30701@postgresqlfr.org> Comments: In-reply-to =?ISO-8859-1?Q?St=E9phane_Schildknecht?= message dated "Tue, 16 Oct 2007 17:26:15 +0200" Date: Tue, 16 Oct 2007 11:30:31 -0400 Message-ID: <17051.1192548631@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200710/187 X-Sequence-Number: 27209 =?ISO-8859-1?Q?St=E9phane_Schildknecht?= writes: > Tom Lane a écrit : >> The real question is how often do rows get updated? I suspect you >> probably need to vacuum this table more than once a day. > To be honest, I suspect it too. But, I have been told by people using > that database they can't do vacuum more frequently than once in a day as > it increases the time to achieve concurrent operations. vacuum_cost_delay can help here. regards, tom lane