From owner-freebsd-stable@FreeBSD.ORG Sun Aug 22 18:18:35 2004 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F228016A4CE for ; Sun, 22 Aug 2004 18:18:34 +0000 (GMT) Received: from mail.kaalys.com (srv1.kaalys.com [69.57.150.87]) by mx1.FreeBSD.org (Postfix) with SMTP id 8DCDD43D46 for ; Sun, 22 Aug 2004 18:18:34 +0000 (GMT) (envelope-from jlavigne@kaalys.com) Received: (qmail 53184 invoked from network); 22 Aug 2004 18:18:33 -0000 Received: from unknown (HELO Julionportable) (80.119.155.230) by mail.kaalys.com with SMTP; 22 Aug 2004 18:18:33 -0000 Message-ID: <004301c2e9ef$6e810540$0d00a8c0@Julionportable> From: "Julien Lavigne du Cadet" To: MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.1 Subject: I/0 issue on a poweredge 750 wit sata raid 1. X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Date: Sun, 22 Aug 2004 18:18:35 -0000 X-Original-Date: Fri, 14 Mar 2003 07:03:26 +0100 X-List-Received-Date: Sun, 22 Aug 2004 18:18:35 -0000 Hi eveybody, =20 I've been using Freebsd 4.x for more than 6 months now, with a very = common system (P4 2,4 - 1Go ram - ide hdd). As I've been very pleased = with this OS, I'd like to use it with one of our new server, a dell = poweredge 750, P4 3,2 - 1Go ram - 2 sata drives on a raid 1 array. =20 So I installed Freebsd 4.10 on it, and everything went well during the = install. But I started a few tests (this machine is supposed to be a web = server), and I've been very disappointed by the I/0 performances. In = fact, the same query on the same database takes 2,56s on my old P4 = (which supports about 300 persons on a vbulletin forum at the same = time), and 4,80s on the new dell. Of course, the mysql configuration is = the same, and I've launched the query a few time to avoid differences = due to mysql cache. Moreover, the new server has been partitioned following the FreeBSD = standards, and softupdate is on whereas the old server doesn't have it. =20 My guess is that it's related to raid and/or sata support on FreeBSD = 4.10 but I was not able to find much about it on google. The only thing = interesting, was on the aac man page, which recommends to add a var to = loader.conf for maximum performances (what I've done but it didn't make = a difference). =20 I didn't make any tuning of things like that. The only thing that's I've = done is to build a new kernel with CPU_ENABLE_SSE and without I386_CPU, = I486_CPU, I586_CPU. =20 Any advice would be greatly appreciated, Best regards, Julien Lavigne du Cadet.=20