From owner-freebsd-questions@FreeBSD.ORG Thu Dec 17 21:47:03 2009 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 92FEF1065676 for ; Thu, 17 Dec 2009 21:47:03 +0000 (UTC) (envelope-from mel.flynn+fbsd.questions@mailing.thruhere.net) Received: from mailhub.rachie.is-a-geek.net (rachie.is-a-geek.net [66.230.99.27]) by mx1.freebsd.org (Postfix) with ESMTP id 678778FC08 for ; Thu, 17 Dec 2009 21:47:03 +0000 (UTC) Received: from smoochies.rachie.is-a-geek.net (mailhub.rachie.is-a-geek.net [192.168.2.11]) by mailhub.rachie.is-a-geek.net (Postfix) with ESMTP id 09C247E818; Thu, 17 Dec 2009 12:47:01 -0900 (AKST) From: Mel Flynn To: freebsd-questions@freebsd.org Date: Thu, 17 Dec 2009 12:46:52 -0900 User-Agent: KMail/1.12.1 (FreeBSD/8.0-STABLE; KDE/4.3.1; i386; ; ) References: <4B2AA1F4.5020206@locolomo.org> In-Reply-To: <4B2AA1F4.5020206@locolomo.org> MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message-Id: <200912171246.53037.mel.flynn+fbsd.questions@mailing.thruhere.net> Cc: Subject: Re: System crashes under heavy disk i/o 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, 17 Dec 2009 21:47:03 -0000 On Thursday 17 December 2009 12:26:12 Erik Norgaard wrote: > My two questions: > > - is there any utility that I can use monitor the system to see what's > going on, when or why? gstat(8) Also, perhaps syslog to a different machine or nfs mount /var/log if you feel you're missing a log message due to this error. > - is there any way that I can slow down the disk i/o? Turn down operating mode via atacontrol. If using dump(8) use the cache feature and/or do the backup from live disk, so no other services are running and disk isn't accessed other then by dump. -- Mel