X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id 33CFAD9B4E for ; Fri, 7 Oct 2005 15:47:48 -0300 (ADT) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 25634-04 for ; Fri, 7 Oct 2005 18:47:42 +0000 (GMT) Received: from davinci.ethosmedia.com (server227.ethosmedia.com [209.128.84.227]) by svr1.postgresql.org (Postfix) with ESMTP id 86CC0D8F06 for ; Fri, 7 Oct 2005 15:47:43 -0300 (ADT) X-EthosMedia-Virus-Scanned: no infections found Received: from [64.81.245.111] (account josh@agliodbs.com HELO temoku.sf.agliodbs.com) by davinci.ethosmedia.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 8220689; Fri, 07 Oct 2005 11:50:09 -0700 From: Josh Berkus Reply-To: josh@agliodbs.com Organization: Aglio Database Solutions To: pgsql-performance@postgresql.org Subject: Re: wal_buffers Date: Fri, 7 Oct 2005 11:51:36 -0700 User-Agent: KMail/1.8 Cc: Ian Westmacott , "Thomas F. O'Connell" References: <1128518624.15795.28.camel@spectre.intellivid.com> <1128603390.18319.16.camel@spectre.intellivid.com> In-Reply-To: <1128603390.18319.16.camel@spectre.intellivid.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200510071151.36959.josh@agliodbs.com> X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.046 required=5 tests=[AWL=-0.004, FORGED_RCVD_HELO=0.05] X-Spam-Level: X-Archive-Number: 200510/147 X-Sequence-Number: 14915 Ian, Thomas, > Thanks; I'd seen the documentation, but not Josh Berkus' > testing. BTW, that's still an open question for me. I'm now theorizing that it's best to set wal_buffers to the expected maximum number of concurrent write connections. However, I don't have enough test systems to test that meaningfully. Your test results will help. -- --Josh Josh Berkus Aglio Database Solutions San Francisco