From owner-freebsd-stable@FreeBSD.ORG Mon Aug 23 20:49:43 2010 Return-Path: Delivered-To: freebsd-stable@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 215C210656A6 for ; Mon, 23 Aug 2010 20:49:43 +0000 (UTC) (envelope-from peterjeremy@acm.org) Received: from mail35.syd.optusnet.com.au (mail35.syd.optusnet.com.au [211.29.133.51]) by mx1.freebsd.org (Postfix) with ESMTP id A94278FC14 for ; Mon, 23 Aug 2010 20:49:42 +0000 (UTC) Received: from server.vk2pj.dyndns.org (c220-239-116-103.belrs4.nsw.optusnet.com.au [220.239.116.103]) by mail35.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id o7NKnPPF007050 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 24 Aug 2010 06:49:27 +1000 X-Bogosity: Ham, spamicity=0.000000 Received: from server.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by server.vk2pj.dyndns.org (8.14.4/8.14.4) with ESMTP id o7NKnOxS007208; Tue, 24 Aug 2010 06:49:24 +1000 (EST) (envelope-from peter@server.vk2pj.dyndns.org) Received: (from peter@localhost) by server.vk2pj.dyndns.org (8.14.4/8.14.4/Submit) id o7NKnN5D007207; Tue, 24 Aug 2010 06:49:23 +1000 (EST) (envelope-from peter) Date: Tue, 24 Aug 2010 06:49:23 +1000 From: Peter Jeremy To: Tim Bishop Message-ID: <20100823204923.GA7142@server.vk2pj.dyndns.org> References: <20100821220435.GA6208@carrick-users.bishnet.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="SLDf9lqlvOQaIe6s" Content-Disposition: inline In-Reply-To: <20100821220435.GA6208@carrick-users.bishnet.net> X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.20 (2009-06-14) Cc: freebsd-stable@FreeBSD.org Subject: Re: 8.1R ZFS almost locking up system X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Aug 2010 20:49:43 -0000 --SLDf9lqlvOQaIe6s Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2010-Aug-21 23:04:35 +0100, Tim Bishop wrote: >I've had a problem on a FreeBSD 8.1R system for a few weeks. It seems >that ZFS gets in to an almost unresponsive state. Last time it did it >(two weeks ago) I couldn't even log in, although the system was up, this >time I could manage a reboot but couldn't stop any applications (they >were likely hanging on I/O). Unless you have a ZFS-only system, it's possible you are running out of free memory (see the "free" entry in top(1) or 'systat -v') - in which case r211581 (and r211599 which fixes a mismerge) should help. Your very high kstat.zfs.misc.arcstats.memory_throttle_count suggests this is your problem. I have a more extensive patch in http://www.freebsd.org/cgi/query-pr.cgi?pr=3D146410 --=20 Peter Jeremy --SLDf9lqlvOQaIe6s Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.15 (FreeBSD) iEYEARECAAYFAkxy3tMACgkQ/opHv/APuIcWagCfVlqFfTfv13KSa+DRUrnvfkIn bnIAmQGQ7FslGYhY+YppLS362fHDTecY =fYwd -----END PGP SIGNATURE----- --SLDf9lqlvOQaIe6s--