From owner-freebsd-stable@FreeBSD.ORG Tue Apr 12 13:43:20 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3737B1065673 for ; Tue, 12 Apr 2011 13:43:20 +0000 (UTC) (envelope-from s.seira@cdmon.com) Received: from correo.cdmon.com (correo.cdmon.com [212.36.82.9]) by mx1.freebsd.org (Postfix) with ESMTP id E6C108FC15 for ; Tue, 12 Apr 2011 13:43:19 +0000 (UTC) Received: from genocida (localhost.cdmon.com [127.0.0.1]) by correo.cdmon.com (Postfix) with ESMTP id 802E61314A5 for ; Tue, 12 Apr 2011 15:23:43 +0200 (CEST) Received: from antispam (localhost.cdmon.com [127.0.0.1]) by correo.cdmon.com (Postfix) with ESMTP id 379A513123B for ; Tue, 12 Apr 2011 15:23:43 +0200 (CEST) Received: from [192.168.0.30] (155.Red-88-2-251.staticIP.rima-tde.net [88.2.251.155]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by correo.cdmon.com (Postfix) with ESMTP id F00881311F9 for ; Tue, 12 Apr 2011 15:23:42 +0200 (CEST) Message-ID: <4DA45264.2090501@cdmon.com> Date: Tue, 12 Apr 2011 15:23:48 +0200 From: Sergi Seira User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100515 Lightning/1.0b1 Icedove/3.0.4 MIME-Version: 1.0 To: freebsd-stable@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: background fsck high load on 8.1 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Apr 2011 13:43:20 -0000 Hello, we've experienced that background fsck on 8.1 degrades server performance on a higher degree than in previous fbsd versions (6.3, 7.3; amd64). We've noticed it after upgrading - same hardware - to a 8.1-RELEASE. Now, performance of other services (i.e. apache, mysql) during a background fsck falls miserably. Is there any way to calm fsck down?, nice(1)?, some sysctl? We have also gmirror, but we prevent to rebuild it if there is a fsck running in background. Thanks for your help, regards, Sergi -- ---8<-------------------- Sergi Seira i Espunya Departament de Sistemes s.seira@cdmon.com www.cdmon.com 93 567 7577 902 364 138 91 182 2767 ext:161 -------------------->8---