From owner-freebsd-performance@FreeBSD.ORG Fri Feb 18 16:22:31 2005 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C1C6A16A4CE for ; Fri, 18 Feb 2005 16:22:31 +0000 (GMT) Received: from ox.eicat.ca (ox.eicat.ca [66.96.30.35]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6231843D45 for ; Fri, 18 Feb 2005 16:22:31 +0000 (GMT) (envelope-from dgilbert@daveg.ca) Received: by ox.eicat.ca (Postfix, from userid 66) id 818D3EA1B; Fri, 18 Feb 2005 11:22:30 -0500 (EST) Received: by canoe.dclg.ca (Postfix, from userid 101) id 6B5256389; Fri, 18 Feb 2005 11:22:24 -0500 (EST) From: David Gilbert MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <16918.5696.196112.640502@canoe.dclg.ca> Date: Fri, 18 Feb 2005 11:22:24 -0500 To: David Rice In-Reply-To: <200502171636.10361.drice@globat.com> References: <200502171636.10361.drice@globat.com> X-Mailer: VM 7.17 under 21.4 (patch 16) "Corporate Culture" XEmacs Lucid cc: freebsd-performance@freebsd.org Subject: High traffic NFS performance and availability problems X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Feb 2005 16:22:31 -0000 >>>>> "David" == David Rice writes: David> The problems we are having is as follows. David> 1. Slow perfomance during peek traffic periods This is due largely to the cache on your RAID hardware card. Unfortunately, this is a failure mode of hardware RAID cards you can't avoid (only delay by buying more disk). David> 2. Client boxes David> have high load averages and sometimes crashes due to slow NFS Clients waiting for nfs requests are still considered "running" David> performance. 3. File servers that randomly crash with "Fatal David> trap 12: page fault while in kernel mode" 4. With soft updates David> enabled during FSCK the fileserver will freeze with all NFS David> processs in the "snaplck" state. We disabled soft updates David> because of this. The remainder of this sounds like memory corruption. Dave. -- ============================================================================ |David Gilbert, Independent Contractor. | Two things can only be | |Mail: dave@daveg.ca | equal if and only if they | |http://daveg.ca | are precisely opposite. | =========================================================GLO================