From owner-freebsd-fs@FreeBSD.ORG Mon May 10 23:19:05 2010 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id A44C71065670 for ; Mon, 10 May 2010 23:19:05 +0000 (UTC) (envelope-from roberto@keltia.freenix.fr) Received: from keltia.net (fbx.keltia.net [82.230.37.243]) by mx1.freebsd.org (Postfix) with ESMTP id 5F1E48FC12 for ; Mon, 10 May 2010 23:19:05 +0000 (UTC) Received: from centre.keltia.net (unknown [IPv6:2a01:240:fe5c::41]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: roberto) by keltia.net (Postfix/TLS) with ESMTPSA id 639317AC5 for ; Tue, 11 May 2010 01:01:23 +0200 (CEST) Date: Tue, 11 May 2010 01:01:19 +0200 From: Ollivier Robert To: freebsd-fs@freebsd.org Message-ID: <20100510230119.GA97909@centre.keltia.net> References: <201005101909.41614.bruce@cran.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: <201005101909.41614.bruce@cran.org.uk> X-Operating-System: MacOS X / Macbook Pro - FreeBSD 7 / Dell D820 SMP User-Agent: Mutt/1.5.20 (2009-06-14) X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.3 (keltia.net); Tue, 11 May 2010 01:01:23 +0200 (CEST) Subject: Re: vm.kmem_size and ZFS on 9-CURRENT X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 May 2010 23:19:05 -0000 According to Bruce Cran: > ZFS on my desktop running 9-CURRENT amd64 with 6GB RAM. In the process of= =20 > copying data off /var to convert it too, I got the "kmem_map too small" p= anic,=20 > which led me to the thread at http://lists.freebsd.org/pipermail/freebsd- > current/2010-April/016984.html which appears to conclude that the default= s=20 > even on -CURRENT aren't suitable and that vm.kmem_size needs tuned to be= =20 > 2xRAM. I'm currently using kmem_size =7F=3D"6G" on a 6GB machine and have got no panic at all.=7F (using the full zfs option though). --=20 Ollivier ROBERT -=3D- FreeBSD: The Power to Serve! -=3D- roberto@keltia.fre= enix.fr In memoriam to Ondine : http://ondine.keltia.net/