From owner-freebsd-stable@FreeBSD.ORG Fri Jan 30 10:50:07 2009 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 DFE33106564A for ; Fri, 30 Jan 2009 10:50:07 +0000 (UTC) (envelope-from BORJAMAR@SARENET.ES) Received: from proxypop2.sarenet.es (proxypop2.sarenet.es [194.30.0.95]) by mx1.freebsd.org (Postfix) with ESMTP id A05D58FC14 for ; Fri, 30 Jan 2009 10:50:07 +0000 (UTC) (envelope-from BORJAMAR@SARENET.ES) Received: from [127.0.0.1] (matahari.sarenet.es [192.148.167.18]) by proxypop2.sarenet.es (Postfix) with ESMTP id 6809E731AA for ; Fri, 30 Jan 2009 11:50:06 +0100 (CET) Message-Id: <6B254849-E2C2-4575-BCCE-60CCA60C426D@SARENET.ES> From: Borja Marcos To: freebsd-stable@freebsd.org In-Reply-To: Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v930.3) Date: Fri, 30 Jan 2009 11:50:05 +0100 References: X-Mailer: Apple Mail (2.930.3) Subject: Re: Puzzling change in performance 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: Fri, 30 Jan 2009 10:50:08 -0000 On Jan 30, 2009, at 10:12 AM, Borja Marcos wrote: > > Hello, > > The attached graphs are from a server running FreeBSD 7.1-i386 (now) > with the typical Apache2+MySQL with forums, Joomla... I see that the attachments didn't make it. Disk I/O bandwidth was an average 40 - 60 % before the update and reboot. After the update and reboot it's now less than 10 %. Most of the I/O activity was on the /var filesystem. It houses the MySQL database and system logs, mostly. So, either: 1- there's an important improvement on file caching from 7.0-STABLE- August to 7.1-RELEASE? 2- Something was rotten since the last reboot in August 3- Something was malfunctioning in the "amr" array controller? (It's a Dell server, and it has two hard disks in mirror) Apache and MySQL had been restarted some times last week, trying to tune some parameters and it made no difference. Any ideas? It's quite weird. Same kernel configuration, same hardware... Borja.