Received: from maia.hub.org (unknown [200.46.204.183]) by mail.postgresql.org (Postfix) with ESMTP id 7A48C6367A6 for ; Tue, 16 Mar 2010 18:39:45 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 13592-07 for ; Tue, 16 Mar 2010 21:39:34 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by mail.postgresql.org (Postfix) with ESMTP id B5CF5632AFB for ; Tue, 16 Mar 2010 18:39:34 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.2/8.14.2) with ESMTP id o2GLdQaX015103; Tue, 16 Mar 2010 17:39:26 -0400 (EDT) To: Alvaro Herrera cc: Greg Stark , Pierre C , Greg Smith , Dave Crooke , Paul McGarry , pgsql-performance@postgresql.org Subject: Re: shared_buffers advice In-reply-to: <20100316213054.GG3037@alvh.no-ip.org> References: <4B9F3302.4020900@2ndquadrant.com> <8285.1268749832@sss.pgh.pa.us> <407d949e1003160753o6e5faa48rabaa42f7548029b7@mail.gmail.com> <20100316213054.GG3037@alvh.no-ip.org> Comments: In-reply-to Alvaro Herrera message dated "Tue, 16 Mar 2010 18:30:54 -0300" Date: Tue, 16 Mar 2010 17:39:26 -0400 Message-ID: <15102.1268775566@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-2.599 tagged_above=-10 required=5 tests=BAYES_00=-2.599 X-Spam-Level: X-Archive-Number: 201003/178 X-Sequence-Number: 38003 Alvaro Herrera writes: > Maybe it would make more sense to try to reorder the fsync calls > instead. Reorder to what, though? You still have the problem that we don't know much about the physical layout on-disk. regards, tom lane