X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (mx2.hub.org [200.46.204.254]) by postgresql.org (Postfix) with ESMTP id B780111F7820 for ; Fri, 21 Apr 2006 09:20:42 -0300 (ADT) X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Score: -0.999 X-Spam-Level: X-Spam-Status: No, score=-0.999 required=5 tests=[AWL=-0.045, BAYES_00=-2.599, DNS_FROM_RFC_ABUSE=0.2, DNS_FROM_RFC_WHOIS=1.447, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] Received: from postgresql.org ([200.46.204.71]) by localhost (mx2.hub.org [200.46.204.254]) (amavisd-new, port 10024) with ESMTP id hi3bS8nArnL8 for ; Fri, 21 Apr 2006 09:20:36 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from mx1.ustc.edu.cn (ns.ustc.edu.cn [202.38.64.1]) by postgresql.org (Postfix) with ESMTP id 858C511F76C0 for ; Fri, 21 Apr 2006 09:20:32 -0300 (ADT) Received: from localhost.localdomain ([211.86.144.78]) by mx1.ustc.edu.cn (8.11.6/8.11.6) with ESMTP id k3LCGlw02948; Fri, 21 Apr 2006 20:16:49 +0800 Received: from wfg by localhost.localdomain with local (Exim 4.50) id 1FWuce-0001ax-Ap; Fri, 21 Apr 2006 20:20:28 +0800 Date: Fri, 21 Apr 2006 20:20:28 +0800 From: Wu Fengguang To: Markus Schaber Cc: pgsql-performance@postgresql.org Subject: Re: Introducing a new linux readahead framework Message-ID: <20060421122028.GA5937@mail.ustc.edu.cn> Mail-Followup-To: Wu Fengguang , Markus Schaber , pgsql-performance@postgresql.org References: <20060421013826.GA5217@mail.ustc.edu.cn> <20060421043147.GV49405@pervasive.com> <20060421071511.GA4885@mail.ustc.edu.cn> <44488F7E.6060704@logix-tt.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <44488F7E.6060704@logix-tt.com> User-Agent: Mutt/1.5.11+cvs20060126 X-Archive-Number: 200604/496 X-Sequence-Number: 18580 Hi Markus, On Fri, Apr 21, 2006 at 09:53:34AM +0200, Markus Schaber wrote: > Are there any rough estimates when this will get into mainline kernel > (if you intend to submit)? I'm not quite sure :) The patch itself has been pretty stable. To get it accepted, we must back it by good benchmarking results for some important applications. I have confirmed that file service via FTP/HTTP/NFS can more or less benefit from it. However, database services have not been touched yet. Oracle/DB2 seem to bypass the readahead code route, while postgresql relies totally on kernel readahead logic. So if postgresql is proved to work well with this patch, it will have good opportunity to go into mainline :) Thanks, Wu