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 o8C9iiD6260070 for ; Sun, 12 Sep 2010 04:44:45 -0500 Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4DD2569342 for ; Sun, 12 Sep 2010 02:45:30 -0700 (PDT) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id uZtIhavc3BcOjem7 for ; Sun, 12 Sep 2010 02:45:30 -0700 (PDT) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 96D3A6C097 for ; Sun, 12 Sep 2010 04:45:30 -0500 (CDT) Message-ID: <4C8CA13A.6010103@hardwarefreak.com> Date: Sun, 12 Sep 2010 04:45:30 -0500 From: Stan Hoeppner MIME-Version: 1.0 Subject: Re: XFS defragmentation issue References: <4C8A4395.5070702@kickstone.com> <4C8B27E4.2050102@kickstone.com> <20100911082330.GG705@dastard> <4C8BDAC8.8010203@hardwarefreak.com> <20100912104321.5529f74c@galadriel.home> In-Reply-To: <20100912104321.5529f74c@galadriel.home> 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: xfs@oss.sgi.com Emmanuel Florac put forth on 9/12/2010 3:43 AM: > Le Sat, 11 Sep 2010 14:38:48 -0500 vous =E9criviez: > = >> That's good to know Dave. Thanks. I created a short-name script a >> while back with "echo 3 > /proc/sys/vm/drop_caches" merely so I could >> "clear the baffles" now and then. = > = > But isn't it somewhat risky? isn't there any risk of data loss by > dropping cache at any moment? From: http://linux-mm.org/Drop_Caches This is a non-destructive operation and will only free things that are completely unused. Dirty objects will continue to be in use until written out to disk and are not freeable. If you run "sync" first to flush them out to disk, these drop operations will tend to free more memory. -- = Stan _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs