From owner-freebsd-questions@FreeBSD.ORG Wed Dec 5 02:49:23 2007 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 BDA8316A417 for ; Wed, 5 Dec 2007 02:49:23 +0000 (UTC) (envelope-from bounces@nabble.com) Received: from kuber.nabble.com (kuber.nabble.com [216.139.236.158]) by mx1.freebsd.org (Postfix) with ESMTP id A07BB13C44B for ; Wed, 5 Dec 2007 02:49:23 +0000 (UTC) (envelope-from bounces@nabble.com) Received: from isper.nabble.com ([192.168.236.156]) by kuber.nabble.com with esmtp (Exim 4.63) (envelope-from ) id 1IzkKB-0002pT-1R for freebsd-questions@freebsd.org; Tue, 04 Dec 2007 18:49:23 -0800 Message-ID: <14164268.post@talk.nabble.com> Date: Tue, 4 Dec 2007 18:49:22 -0800 (PST) From: yar To: freebsd-questions@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Nabble-From: owensr57@gmail.com Subject: What is best method to debug freezes/hangs? 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: Wed, 05 Dec 2007 02:49:23 -0000 My question is how best to go about debugging sporadic freezes and hangs. Just looking for general methods. On a couple of our IDS systems there are sporadic hangs or freezes that occur every couple weeks or so, that are recoverable by either system reboots or taking out and reinserting the Gig fiber ethernet sniffing cables, but I never can find anything in /var/logs/messages to tell what is going on. I'm assuming that may have to compile in kernel debugger support, but from what I read briefly, doesn't that require an actual crash with the resultant reboot and a debugger readable file left in /var/crash? That doesn't happen, there is no automatic reboot just a freeze/hang (box falls off network and at the console unable to type until one of the two above mentioned measures are take. The systems are: Dell 1850's Free BSD 6.2 2 Gb ram running various open source IDS software BRO Thanks -- View this message in context: http://www.nabble.com/What-is-best-method-to-debug-freezes-hangs--tf4947151.html#a14164268 Sent from the freebsd-questions mailing list archive at Nabble.com.