X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by postgresql.org (Postfix) with ESMTP id 193449DCB6C for ; Thu, 8 Dec 2005 07:30:03 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 92237-04 for ; Thu, 8 Dec 2005 07:30:04 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey- Received: from campbell-lange.net (campbell-lange.net [217.147.82.41]) by postgresql.org (Postfix) with ESMTP id 689759DCB64 for ; Thu, 8 Dec 2005 07:29:59 -0400 (AST) Received: from host-83-146-33-145.bulldogdsl.com ([83.146.33.145] helo=orchard) by localhost.localdomain with esmtpa (Exim 4.54) id 1EkJyU-0000vc-8d; Thu, 08 Dec 2005 11:30:11 +0000 Received: from rory by orchard with local (Exim 4.54) id 1EkJx3-0004yZ-RQ; Thu, 08 Dec 2005 11:28:41 +0000 Date: Thu, 8 Dec 2005 11:28:41 +0000 From: Rory Campbell-Lange To: Alex Turner , pgsql-performance@postgresql.org Subject: Re: LVM and Postgres Message-ID: <20051208112841.GA17840@campbell-lange.net> References: <20051206093818.GE6708@campbell-lange.net> <20051206213623.GD14427@campbell-lange.net> <20051207002537.GN7330@mathom.us> <33c6269f0512061652u73a690t8af8a276118b1a83@mail.gmail.com> <20051207013107.GP7330@mathom.us> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051207013107.GP7330@mathom.us> User-Agent: Mutt/1.5.9i X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.444 required=5 tests=[AWL=0.444] X-Spam-Score: 0.444 X-Spam-Level: X-Archive-Number: 200512/240 X-Sequence-Number: 16061 On 06/12/05, Michael Stone (mstone+postgres@mathom.us) wrote: > On Tue, Dec 06, 2005 at 07:52:25PM -0500, Alex Turner wrote: > >I would argue that almost certainly won't by doing that as you will > >create a new place even further away for the disk head to seek to > >instead of just another file on the same FS that is probably closer to > >the current head position. > > I would argue that you should benchmark it instead of speculating. Is there a good way of benchmarking? We don't have much in the way of test data at present. Regards, Rory -- Rory Campbell-Lange