From owner-freebsd-questions@FreeBSD.ORG Sun Sep 18 13:29:23 2011 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 CD93C1065782 for ; Sun, 18 Sep 2011 13:29:23 +0000 (UTC) (envelope-from arab@tangerine-army.co.uk) Received: from mtaout02-winn.ispmail.ntl.com (mtaout02-winn.ispmail.ntl.com [81.103.221.48]) by mx1.freebsd.org (Postfix) with ESMTP id 5D44D8FC12 for ; Sun, 18 Sep 2011 13:29:23 +0000 (UTC) Received: from know-smtpout-4.server.virginmedia.net ([62.254.123.2]) by mtaout02-winn.ispmail.ntl.com (InterMail vM.7.08.04.00 201-2186-134-20080326) with ESMTP id <20110918132921.RBUD17426.mtaout02-winn.ispmail.ntl.com@know-smtpout-4.server.virginmedia.net> for ; Sun, 18 Sep 2011 14:29:21 +0100 Received: from [94.168.169.90] (helo=mercury.universe.galaxy.lcl) by know-smtpout-4.server.virginmedia.net with esmtp (Exim 4.63) (envelope-from ) id 1R5HQv-0008C6-Oz for freebsd-questions@freebsd.org; Sun, 18 Sep 2011 14:29:21 +0100 Received: from mercury.universe.galaxy.lcl ([::1]) by mercury.universe.galaxy.lcl ([::1]) with mapi; Sun, 18 Sep 2011 14:29:21 +0100 From: Graeme Dargie To: "'freebsd-questions@freebsd.org'" Date: Sun, 18 Sep 2011 14:29:20 +0100 Thread-Topic: System locking up. Thread-Index: Acx1ifXals2fokksTrCFdeVeao2FLw== Message-ID: <0EE458C34045A44DBC2CA2DC5CEB42B52344BE4831@mercury.universe.galaxy.lcl> Accept-Language: en-US, en-GB Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US, en-GB MIME-Version: 1.0 X-Cloudmark-Analysis: v=1.1 cv=JvdXmxIgLJv2/GthKqHpGJEEHukvLcvELVXUanXFreg= c=1 sm=0 a=OMdUhd4NiskA:10 a=xqWC_Br6kY4A:10 a=aV7j-niqUELn6Ud-mJoA:9 a=6EkCrdmv52SB2o175akA:7 a=CjuIK1q_8ugA:10 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=hOlNQF-szbnUwE9608YA:7 a=gKO2Hq4RSVkA:10 a=hTZeC7Yk6K0A:10 a=HpAAvcLHHh0Zw7uRqdWCyQ==:117 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: System locking up. 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: Sun, 18 Sep 2011 13:29:23 -0000 Hi All, I have a system that is being problematic, I suspect but I cannot say for s= ure it is maybe related to ZFS as I have a fairly large ZFS pool on the mac= hine. The system will just lock up, local console does not respond to the k= eyboard, num lock still changes the led on the keyboard, the system still r= esponds to pings but you cannot ssh to the unit. The behaviour is random th= e system can be running for 50 days plus with no issues then suddenly it en= ters this state, the error logs do not show anything. System 8.2-RELEASE FreeBSD 8.2-RELEASE #0 AMD 64 Running on an AMD x2 5600 4gb of DDR2 Gmirror 80gb boot disks 6 x 1.5TB SATA II disks using AHCI Loader.conf vfs.zfs.prefetch_disable=3D0 //vfs.zfs.txg.timeout=3D"5" vm.kmem_size=3D"1024M" vm.kmem_size_max=3D"1024M" vfs.zfs.arc_max=3D"100M" vfs.zfs.vdev.cache.size=3D"100M" ZFS filesystem version 4 ZFS storage pool version 15 Is this likely to be a case of just not enough ram? Or is there some other = trouble shooting I could do to try and nail down what is going on as it ten= ds to happen when the ZFS zpool is being accessed heavily. Regards Graeme