From owner-freebsd-fs@FreeBSD.ORG Sun Aug 30 17:40:22 2009 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 54AAB106566B for ; Sun, 30 Aug 2009 17:40:22 +0000 (UTC) (envelope-from gallasch@free.de) Received: from smtp.free.de (smtp.free.de [91.204.6.103]) by mx1.freebsd.org (Postfix) with ESMTP id B15E78FC08 for ; Sun, 30 Aug 2009 17:40:21 +0000 (UTC) Received: (qmail 27739 invoked from network); 30 Aug 2009 19:13:39 +0200 Received: from smtp.free.de (HELO orwell.free.de) (gallasch@free.de@[91.204.4.103]) (envelope-sender ) by smtp.free.de (qmail-ldap-1.03) with AES128-SHA encrypted SMTP for ; 30 Aug 2009 19:13:39 +0200 Date: Sun, 30 Aug 2009 19:13:36 +0200 From: Kai Gallasch To: freebsd-fs@freebsd.org Message-ID: <20090830191336.5f1cdec0@orwell.free.de> In-Reply-To: <20090829160037.GA1848@garage.freebsd.pl> References: <4A927CB3.3040402@plus-plus.su> <4A964F4E.4080009@plus-plus.su> <4A9656CE.8020107@plus-plus.su> <367b2c980908270316n7a21673ek3a997573f2fadbb0@mail.gmail.com> <4A96731D.20406@plus-plus.su> <4A967680.2030205@plus-plus.su> <4A969D20.40809@plus-plus.su> <20090829160037.GA1848@garage.freebsd.pl> X-Mailer: Claws Mail 3.7.0 (GTK+ 2.16.4; powerpc-apple-darwin9.7.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: need help with ZFS 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: Sun, 30 Aug 2009 17:40:22 -0000 On Sat, 29 Aug 2009 18:00:37 +0200 wrote Pawel Jakub Dawidek : > > bonnie++ -s17000 -d. -n128 > > > > for about 10 minutes: > > > > http://omploader.org/vMjg5aQ/IMG_0057.jpg > [...] > > I'm running your test on pretty low-end h/w (i386, 1GB of RAM, two > cores) and cannot reproduce the problem for few hours now. The only > tuning I did was to set vm.kmem_size to 1GB. You still need to do > this very tuning even on amd64. Hi. Could you give a short explanation why on amd64 it is still necessary to set vm.kmem_size to 1GB ? I thought with zfs on FreeBSD-7.2-STABLE tuning kmem was not necessary any more. The reason I ask is, I have some servers on FreeBSD-7.2-STABLE AMD64 that are quite stable, but sometimes suffer from zfs performance degradation when zfs is competing with applications using huge amounts of RAM. Those servers are not swapping at all when this takes place. --Kai.