From owner-freebsd-questions@FreeBSD.ORG Thu Mar 6 12:14:08 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 67D2A1065673 for ; Thu, 6 Mar 2008 12:14:08 +0000 (UTC) (envelope-from neil@darlow.co.uk) Received: from mtaout03-winn.ispmail.ntl.com (mtaout03-winn.ispmail.ntl.com [81.103.221.49]) by mx1.freebsd.org (Postfix) with ESMTP id D583C8FC29 for ; Thu, 6 Mar 2008 12:14:06 +0000 (UTC) (envelope-from neil@darlow.co.uk) Received: from aamtaout01-winn.ispmail.ntl.com ([81.103.221.35]) by mtaout03-winn.ispmail.ntl.com with ESMTP id <20080306121659.DWKV19530.mtaout03-winn.ispmail.ntl.com@aamtaout01-winn.ispmail.ntl.com> for ; Thu, 6 Mar 2008 12:16:59 +0000 Received: from router.darlow.co.uk ([80.6.42.220]) by aamtaout01-winn.ispmail.ntl.com with ESMTP id <20080306121705.QAVW219.aamtaout01-winn.ispmail.ntl.com@router.darlow.co.uk> for ; Thu, 6 Mar 2008 12:17:05 +0000 Received: from router.darlow.co.uk (localhost [127.0.0.1]) by router.darlow.co.uk (Postfix) with ESMTP id 97B921033C8 for ; Thu, 6 Mar 2008 12:14:03 +0000 (GMT) Received: from [192.168.0.241] (aurora.darlow.co.uk [192.168.0.241]) by router.darlow.co.uk (Postfix) with ESMTPSA id 54917102D73 for ; Thu, 6 Mar 2008 12:14:03 +0000 (GMT) Message-ID: <47CFE00A.7000005@darlow.co.uk> Date: Thu, 06 Mar 2008 12:14:02 +0000 From: Neil Darlow User-Agent: Thunderbird 2.0.0.12 (X11/20080228) MIME-Version: 1.0 To: freebsd-questions@freebsd.org References: <47CFC032.10806@darlow.co.uk> <47CFCA07.4020100@FreeBSD.org> In-Reply-To: <47CFCA07.4020100@FreeBSD.org> X-Enigmail-Version: 0.95.6 OpenPGP: id=531F9048 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamSMTP-1.9/ClamAV-0.92.1 Subject: Re: syslogd and bzip2 hogs after 6.3 to 7.0 upgrade X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 06 Mar 2008 12:14:08 -0000 Hi, Kris Kennaway wrote: > This should be unrelated to bzip since that is purely CPU bound. What > is causing the interrupts? Check vmstat -i. That is likely to be your > real problem. The cause of the high interrupt incidence was failed DMA operations on my DVD-RW drive. The situation arose as follows: 1) My backup program executes at 11:30 UTC and uses growisofs to create a DVD on-the-fly. 2) newsyslog executes at 00:00 UTC and compresses the logfiles with bzip2. 3) The DVD-RW drive DMA errors appear. I've rebooted the system and watched cron execute newsyslog to rotate the logs. I have a bzip2 process that's consuming over 90% of CPU. That can't be normal? Regards, Neil Darlow