From owner-freebsd-stable@FreeBSD.ORG  Mon Apr 18 19:53:54 2005
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 27F0816A4CE
	for <stable@freebsd.org>; Mon, 18 Apr 2005 19:53:54 +0000 (GMT)
Received: from freebee.digiware.nl (dsl439.iae.nl [212.61.63.187])
	by mx1.FreeBSD.org (Postfix) with ESMTP id E3F2143D45
	for <stable@freebsd.org>; Mon, 18 Apr 2005 19:53:52 +0000 (GMT)
	(envelope-from wjw@withagen.nl)
Received: from [212.61.27.71] (dual.digiware.nl [212.61.27.71])
	by freebee.digiware.nl (8.13.1/8.13.1) with ESMTP id j3IJrkHL047216;
	Mon, 18 Apr 2005 21:53:46 +0200 (CEST)
	(envelope-from wjw@withagen.nl)
Message-ID: <4264104B.2030600@withagen.nl>
Date: Mon, 18 Apr 2005 21:53:47 +0200
From: Willem Jan Withagen <wjw@withagen.nl>
User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Claus Guttesen <kometen@gmail.com>
References: <6eb82e05041500274172afd3@mail.gmail.com>
	<20050416122222.GA12385@totem.fix.no>
	<6eb82e0504160536572e068c@mail.gmail.com>
	<20050416183755.GB61170@xor.obsecurity.org>	 <4262CFBF.4090709@withagen.nl>
	<b41c755205041801433fad9c65@mail.gmail.com>
In-Reply-To: <b41c755205041801433fad9c65@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
cc: stable@freebsd.org
cc: Kris Kennaway <kris@obsecurity.org>
Subject: Re: NFS defaults for read/write blocksize....(Was: Re: 5.4/amd64
 console hang)
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Production branch of FreeBSD source code
	<freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 18 Apr 2005 19:53:54 -0000

Claus Guttesen wrote:
>>>>By the way, I'm thinking that more frequently hang might related with
>>>>large read/write block in mount_nfs -r/-w (I use 8192, original is 1024).
>>>
>>>
>>>That's certainly possible since non-default settings don't get as much
>>>testing.  It would be good to get a traceback.
>>
>>Has it even been considered to up these values to something bigger??
> 
> 
> Read- and write-size of 32768 seems to work optimal for me:

How did you come to this conclusion? What kind of workload?

> nfssrv:/nfsmnt  /localsrv/nfsmnt   nfs   
> rw,tcp,intr,nfsv3,-w=32768,-r=32768   0    0
> 
> Nfs-server is an i386 and clients are i386 and amd64.

This is in line with what the graphs suggest:
	Use Laaarrrrrggggeee sizes.
But because of the non-significance of bonnie, I'm reluctant to accept my work 
as 100% proof.

--WjW