From owner-freebsd-hackers@FreeBSD.ORG  Tue Jan 19 09:46:23 2010
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id D23B110656A8
	for <freebsd-hackers@freebsd.org>; Tue, 19 Jan 2010 09:46:23 +0000 (UTC)
	(envelope-from freebsd-hackers@m.gmane.org)
Received: from lo.gmane.org (lo.gmane.org [80.91.229.12])
	by mx1.freebsd.org (Postfix) with ESMTP id 8DCDA8FC14
	for <freebsd-hackers@freebsd.org>; Tue, 19 Jan 2010 09:46:23 +0000 (UTC)
Received: from list by lo.gmane.org with local (Exim 4.50) id 1NXAfC-0004et-2U
	for freebsd-hackers@freebsd.org; Tue, 19 Jan 2010 10:46:18 +0100
Received: from lara.cc.fer.hr ([161.53.72.113])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <freebsd-hackers@freebsd.org>; Tue, 19 Jan 2010 10:46:18 +0100
Received: from ivoras by lara.cc.fer.hr with local (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <freebsd-hackers@freebsd.org>; Tue, 19 Jan 2010 10:46:18 +0100
X-Injected-Via-Gmane: http://gmane.org/
To: freebsd-hackers@freebsd.org
From: Ivan Voras <ivoras@freebsd.org>
Date: Tue, 19 Jan 2010 10:45:59 +0100
Lines: 34
Message-ID: <hj3v0i$i2p$1@ger.gmane.org>
References: <7f14551c1001190119x46c6b04dx2362cd1252f0d81@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Complaints-To: usenet@ger.gmane.org
X-Gmane-NNTP-Posting-Host: lara.cc.fer.hr
User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US;
	rv:1.9.1.5) Gecko/20100118 Thunderbird/3.0
In-Reply-To: <7f14551c1001190119x46c6b04dx2362cd1252f0d81@mail.gmail.com>
Sender: news <news@ger.gmane.org>
Subject: Re: Setting "zfs_arc_max" value in FreeBSD 8.
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 19 Jan 2010 09:46:23 -0000

On 01/19/10 10:19, Sherin George wrote:
> Hello,
>
> I am trying to tune ZFS file system by setting "zfs_arc_max" value in
> FreeBSD 8.
>
> In solaris, it is achieved like this
>
> =================================================
> For example, if an application needs 5 GBytes of memory on a system with
> 36-GBytes of memory, you could set the arc maximum to 30 GBytes,
> (0x780000000 or 32212254720 bytes). Set the zfs:zfs_arc_max parameter in the
> /etc/system file:
>
> set zfs:zfs_arc_max = 0x780000000
>
> or
>
> set zfs:zfs_arc_max = 32212254720
> =================================================
>
> But, I couldn't find /etc/system file in FreeBSD.
>
> Could some one please guide me to correctly configure "zfs_arc_max" in
> FreeBSD 8.

You should probably start here:

http://wiki.freebsd.org/ZFSTuningGuide

and more generally, here:

http://wiki.freebsd.org/ZFS