From owner-freebsd-stable@FreeBSD.ORG Sun Oct 16 13:27:09 2005 Return-Path: <owner-freebsd-stable@FreeBSD.ORG> X-Original-To: stable@freebsd.org 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 12CB216A41F for <stable@freebsd.org>; Sun, 16 Oct 2005 13:27:09 +0000 (GMT) (envelope-from WillS@housing.ufl.edu) Received: from smtp.housing.ufl.edu (smtp2.housing.ufl.edu [128.227.47.16]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6222E43D48 for <stable@freebsd.org>; Sun, 16 Oct 2005 13:27:07 +0000 (GMT) (envelope-from WillS@housing.ufl.edu) Received: (qmail 10675 invoked by uid 98); 16 Oct 2005 13:27:05 -0000 Received: from 128.227.47.18 by smtp1.housing.ufl.edu (envelope-from <WillS@housing.ufl.edu>, uid 82) with qmail-scanner-1.25 (clamdscan: 0.87/1082. spamassassin: 3.0.4. Clear:RC:1(128.227.47.18):. Processed in 0.462872 secs); 16 Oct 2005 13:27:05 -0000 X-Qmail-Scanner-Mail-From: WillS@housing.ufl.edu via smtp1.housing.ufl.edu X-Qmail-Scanner: 1.25 (Clear:RC:1(128.227.47.18):. Processed in 0.462872 secs) Received: from bragi.housing.ufl.edu (128.227.47.18) by smtp.housing.ufl.edu with SMTP; 16 Oct 2005 13:27:05 -0000 content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Date: Sun, 16 Oct 2005 09:16:34 -0400 Message-ID: <0E972CEE334BFE4291CD07E056C76ED807738005@bragi.housing.ufl.edu> X-MimeOLE: Produced By Microsoft Exchange V6.0.6556.0 X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Disk 100% busy Thread-Index: AcXSU9SjB83Z3BwyQQ6rwOsrftuhNg== From: "Will Saxon" <WillS@housing.ufl.edu> To: <stable@freebsd.org> Cc: Subject: Disk 100% busy X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable> List-Post: <mailto:freebsd-stable@freebsd.org> List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=subscribe> X-List-Received-Date: Sun, 16 Oct 2005 13:27:09 -0000 I am trying to diagnose a problem whereby a virus scanner (clam antivirus) is taking too long to scan attachments on a mail server. We have an attachment limitation of 20MB and an attachment of 7-20MB can take over 3 minutes to scan. This often causes the sending mail server to timeout and resend the mail. =20 In this case, my mail gateway is is a dual 3.06GHz Xeon with 1GB of ram and 2 36GB 15krpm drives in a raid-1 on a smart array 6i (cciss) controller. I am running FreeBSD 5.4-RELEASE-p1.=20 Systat -vmstat reports the disk mirror is 100% busy at all times on this machine, with an average of around 300 tps at 15KB/t. This seems wrong to me, as these numbers are maintained even when the system doesn't otherwise appear busy. We don't seem to be swamped by log writes. How can I tell what's generating these disk writes? At the moment the 100% disk utilization is the only thing I can see that would cause the scanning delay. The machine overall is sluggish with file operations.=20 -Will -- Will Saxon Systems Programmer, Network Services University of Florida Department of Housing Phone: (352) 392-2171 x10148 Email: wills@housing.ufl.edu