From owner-freebsd-questions@FreeBSD.ORG Wed Jan 13 18:12:11 2010 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 21CD9106566B for ; Wed, 13 Jan 2010 18:12:11 +0000 (UTC) (envelope-from doug@polands.org) Received: from hrndva-omtalb.mail.rr.com (hrndva-omtalb.mail.rr.com [71.74.56.122]) by mx1.freebsd.org (Postfix) with ESMTP id B8C138FC1C for ; Wed, 13 Jan 2010 18:12:10 +0000 (UTC) X-Authority-Analysis: v=1.0 c=1 a=sVhNVL3m-NYA:10 a=tH3TCQxNhl/vWwTfLVWeHw==:17 a=oJWsu3h6Atdd_GdWCOkA:9 a=AniD2FO5ljGg-amRKnTBBnMrYiMA:4 X-Cloudmark-Score: 0 X-Originating-IP: 75.87.219.217 Received: from [75.87.219.217] ([75.87.219.217:54753] helo=haran.polands.org) by hrndva-oedge03.mail.rr.com (envelope-from ) (ecelerity 2.2.2.39 r()) with ESMTP id E2/79-05182-9FC0E4B4; Wed, 13 Jan 2010 18:12:09 +0000 Received: from email.polands.org (ammon.polands.org [172.16.1.7]) by haran.polands.org (8.14.3/8.14.3) with ESMTP id o0DIC8fo087693; Wed, 13 Jan 2010 12:12:08 -0600 (CST) (envelope-from doug@polands.org) Received: from 209.103.214.35 (SquirrelMail authenticated user djp) by email.polands.org with HTTP; Wed, 13 Jan 2010 12:12:09 -0600 Message-ID: In-Reply-To: References: <8418112cdfada93d83ca0cb5307c1d21.squirrel@email.polands.org> Date: Wed, 13 Jan 2010 12:12:09 -0600 From: "Doug Poland" To: "Ivan Voras" User-Agent: SquirrelMail/1.4.20-RC2 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal Cc: freebsd-questions@freebsd.org Subject: Re: 8.0-R-p2 ZFS: unixbench causing kmem exhaustion panic 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, 13 Jan 2010 18:12:11 -0000 On Wed, January 13, 2010 11:55, Ivan Voras wrote: > Doug Poland wrote: > >> So the question is, can ZFS be tuned to not panic or hang no matter >> what I throw at it? > > Apparently not. > > > I began with a system with no tunables in /boot/loader.conf > > (vm.kmem_size and vm.kmem_size_max). Then I tried increasing > > vm.kmem_size and vm.kmem_size_max a GB at a time, until I was at > 4GB. > > Try adding vfs.zfs.arc_max=512M to /boot/loader.conf. > Would you suggest tweaking the vm.kmem_size tunables in addition to arc_max? -- Regards, Doug