From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o6RAiqx6180067 for ; Tue, 27 Jul 2010 05:44:52 -0500 Received: from smtp4-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B1D5047582D for ; Tue, 27 Jul 2010 03:47:55 -0700 (PDT) Received: from smtp4-g21.free.fr (smtp4-g21.free.fr [212.27.42.4]) by cuda.sgi.com with ESMTP id mBaJEZJbc16ourrN for ; Tue, 27 Jul 2010 03:47:55 -0700 (PDT) Date: Tue, 27 Jul 2010 12:47:50 +0200 From: Emmanuel Florac Subject: Re: High latencies writing to a memory mapped file Message-ID: <20100727124750.30bb3209@harpe.intellique.com> In-Reply-To: <20100727092452.GA23307@citd.de> References: <20100722144706.GA2840@BohrerMBP.rgmadvisors.com> <20100727092452.GA23307@citd.de> Mime-Version: 1.0 List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Matthias Schniedermeyer Cc: Shawn Bohrer , xfs@oss.sgi.com Le Tue, 27 Jul 2010 11:24:52 +0200 Matthias Schniedermeyer =E9crivait: > In case anybody has an idea what i could do to identify and/or > isolate the root-cause, i'm open for suggestions. > = I'd thought that the io scheduler is the culprit. I've generally found that the default CFQ scheduler (default) is terrible for file servers. -- = ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs