X-Original-To: pgsql-performance-postgresql.org@postgresql.org Received: from localhost (wm.hub.org [200.46.204.128]) by postgresql.org (Postfix) with ESMTP id 136039FB354 for ; Fri, 22 Sep 2006 06:13:08 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.128]) (amavisd-new, port 10024) with ESMTP id 62212-01 for ; Fri, 22 Sep 2006 09:12:57 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey- Received: from mail.logix-tt.com (mail.logix-tt.com [212.211.145.186]) by postgresql.org (Postfix) with ESMTP id B82FD9FB353 for ; Fri, 22 Sep 2006 06:12:57 -0300 (ADT) Received: from kingfisher.intern.logix-tt.com (84-72-188-217.dclient.hispeed.ch [84.72.188.217]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.logix-tt.com (Postfix) with ESMTP id D9DF465978 for ; Fri, 22 Sep 2006 11:15:16 +0200 (CEST) Received: from [127.0.0.1] (localhost [127.0.0.1]) by kingfisher.intern.logix-tt.com (Postfix) with ESMTP id 4290D181AC469 for ; Fri, 22 Sep 2006 11:13:01 +0200 (CEST) Message-ID: <4513A91D.60501@logix-tt.com> Date: Fri, 22 Sep 2006 11:13:01 +0200 From: Markus Schaber Organization: Logical Tracking and Tracing International AG, Switzerland User-Agent: Thunderbird 1.5.0.5 (X11/20060812) MIME-Version: 1.0 To: PostgreSQL Performance List Subject: Re: Large tables (was: RAID 0 not as fast as References: <45123FC0.9060100@logix-tt.com> <20060922025209.GO6211@esphion.com> In-Reply-To: <20060922025209.GO6211@esphion.com> X-Enigmail-Version: 0.94.0.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0.135 tagged_above=0 required=5 tests=FORGED_RCVD_HELO X-Spam-Level: X-Archive-Number: 200609/298 X-Sequence-Number: 20984 Hi, Guy, Guy Thornley wrote: > Of course you could argue the OS should be able to detect this, and prevent > it occuring anyway. I don't know anything about linux's behaviour in this > area. Yes, one can argue that way. But a generic Algorithm in the OS can never be as smart as the application which has more informations about semantics and algorithms. Everything else would need a crystal ball device :-) HTH, Markus -- Markus Schaber | Logical Tracking&Tracing International AG Dipl. Inf. | Software Development GIS Fight against software patents in Europe! www.ffii.org www.nosoftwarepatents.org