From owner-freebsd-performance@FreeBSD.ORG Tue May 5 18:26:46 2009 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 656DA1065688 for ; Tue, 5 May 2009 18:26:46 +0000 (UTC) (envelope-from leccine@gmail.com) Received: from mail-ew0-f159.google.com (mail-ew0-f159.google.com [209.85.219.159]) by mx1.freebsd.org (Postfix) with ESMTP id DD6098FC17 for ; Tue, 5 May 2009 18:26:45 +0000 (UTC) (envelope-from leccine@gmail.com) Received: by ewy3 with SMTP id 3so62487ewy.43 for ; Tue, 05 May 2009 11:26:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=rQl4o6ZDc/oWtPjDv491UW0HhdSlbgACcAD4hTLC7Ic=; b=Z1w2HdBIaNitlNh3aZf+KBL8eM6wrSgWicc4NABU4IF7XvlO1HOZenG1knt6V6u03E NfF2vjDrkYPQQhDbV1MNAlZ13dUtL+r2HjiO5/pK69sb27USgfFx/2YfUjwFAJB4YTv5 2TFkMd9b1juPgnekgGESkwYJ9aE7tWXQLaorE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=sAcYuaTS4cK8lzXAdGxUDRQImj0m2SCO84nbhOdRcB5hHIZzkD61n0KzdMAlAwOlTx P0kdSGkQCeLbgkO6y2vay15BBDDFCKWwCxbsgCjwE68VkXTlW4QQ5rzfRJYySrWYLAKY 6GT3iXG7CdhdvLZnffKA6T7qKigoiQSl4ZwP0= MIME-Version: 1.0 Received: by 10.210.58.17 with SMTP id g17mr461195eba.20.1241546663366; Tue, 05 May 2009 11:04:23 -0700 (PDT) In-Reply-To: <4A005935.40206@opnet.com> References: <4A005935.40206@opnet.com> Date: Tue, 5 May 2009 19:04:23 +0100 Message-ID: From: =?ISO-8859-1?B?SXN0duFu?= To: Stephen Sanders Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-performance@freebsd.org Subject: Re: VM sysctl tuning X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 May 2009 18:26:46 -0000 I guess you can find some useful information here: http://wiki.freebsd.org/ZFSTuningGuide Please note the difference between 7.2 and all the previous releases. "FreeBSD 7.2+ has improved kernel memory allocation strategy and no tuning may be necessary on systems with more than 2 GB of RAM. " Also wort play a bit with kern.maxvnodes as the document says. Not to forget: http://www.freebsd.org/doc/en/books/arch-handbook/vm-tuning.html Regards, Istvan On Tue, May 5, 2009 at 4:20 PM, Stephen Sanders wrote: > Does any know if there is any advantage to tuning sysctl's for the VM > when one has an insane amount of memory in their machine? > > We've a system with 16GB of RAM that we are attempting to optimize the > system's memory copy and disk write performance. > > Thanks. > > > _______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to " > freebsd-performance-unsubscribe@freebsd.org" > -- the sun shines for all