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 p0R5EoBN190411 for ; Wed, 26 Jan 2011 23:14:50 -0600 Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A0BDD27FDB2 for ; Wed, 26 Jan 2011 21:17:14 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id JKQdx4ODpLEXABTE for ; Wed, 26 Jan 2011 21:17:14 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id CDC636C0CE for ; Wed, 26 Jan 2011 23:17:13 -0600 (CST) Message-ID: <4D40FFD9.80707@hardwarefreak.com> Date: Wed, 26 Jan 2011 23:17:13 -0600 From: Stan Hoeppner MIME-Version: 1.0 Subject: Re: xfs: very slow after mount, very slow at umount References: <4D40C8D1.8090202@teksavvy.com> <20110127033011.GH21311@dastard> <4D40EB2F.2050809@teksavvy.com> In-Reply-To: <4D40EB2F.2050809@teksavvy.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com Mark Lord put forth on 1/26/2011 9:49 PM: > agcount=7453 That's probably a bit high Mark, and very possibly the cause of your problems. :) Unless the disk array backing this filesystem has something like 400-800 striped disk drives. You said it's a single 2TB drive right? The default agcount for a single drive filesystem is 4 allocation groups. For mdraid (of any number of disks/configuration) it's 16 allocation groups. Why/how did you end up with 7452 allocation groups? That can definitely cause some performance issues due to massively excessive head seeking, and possibly all manner of weirdness. -- Stan _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs