X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (mx1.hub.org [200.46.208.251]) by postgresql.org (Postfix) with ESMTP id BF92A9FA22C for ; Fri, 19 May 2006 17:16:17 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.208.251]) (amavisd-new, port 10024) with ESMTP id 57867-10 for ; Fri, 19 May 2006 17:16:10 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from noel.decibel.org (noel.decibel.org [67.100.216.10]) by postgresql.org (Postfix) with ESMTP id 724A59FA278 for ; Fri, 19 May 2006 17:16:06 -0300 (ADT) Received: by noel.decibel.org (Postfix, from userid 1001) id E60A456427; Fri, 19 May 2006 15:16:03 -0500 (CDT) Received: (hashcash-sendmail, from uid 1001); Fri, 19 May 2006 15:16:03 -0500 Date: Fri, 19 May 2006 15:16:01 -0500 From: "Jim C. Nasby" To: Chris Mair Cc: Olivier Andreotti , pgsql-performance@postgresql.org Subject: Re: Benchmarck PostgreSQL 8.1.4 MySQL 5.0.20 and Oracle Message-ID: <20060519201600.GL64371@pervasive.com> References: <1147947373.7943.35.camel@dell.home.lan> <1147956280.9324.7.camel@dell.home.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1147956280.9324.7.camel@dell.home.lan> X-Operating-System: FreeBSD 6.0-RELEASE-p4 amd64 X-Distributed: Join the Effort! http://www.distributed.net User-Agent: Mutt/1.5.11 X-Hashcash: 1:20:060519:list@1006.org::MQHS4WLrK4qK4cyu:000015hZ X-Hashcash: 1:20:060519:olivier.andreotti@gmail.com::GyhVg3VFDFImARe8:0000000000 00000000000000000000000025Pl X-Hashcash: 1:20:060519:pgsql-performance@postgresql.org::xrKT/ToqTM91bt/B:00000 00000000000000000000000007Me X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200605/403 X-Sequence-Number: 19190 On Thu, May 18, 2006 at 02:44:40PM +0200, Chris Mair wrote: > Yes, pg_xlog ist also used with fsync=off. you might gain quite some > performance if you can manage to put pg_xlog on its own disk (just > symlink the directory). Substantially increasing wal buffers might help too. -- Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461