From owner-freebsd-net  Fri May  8 06:58:27 1998
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id GAA25167
          for freebsd-net-outgoing; Fri, 8 May 1998 06:58:27 -0700 (PDT)
          (envelope-from owner-freebsd-net@FreeBSD.ORG)
Received: from jingoro.prevmed.sunysb.edu (jingoro.prevmed.sunysb.edu [129.49.123.10])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id GAA25147
          for <freebsd-net@FreeBSD.ORG>; Fri, 8 May 1998 06:58:10 -0700 (PDT)
          (envelope-from cfanning@jingoro.prevmed.sunysb.edu)
Received: (from cfanning@localhost)
	by jingoro.prevmed.sunysb.edu (8.8.8/8.8.5) id JAA11923;
	Fri, 8 May 1998 09:49:16 GMT
From: Chris Fanning <cfanning@jingoro.prevmed.sunysb.edu>
Message-Id: <199805080949.JAA11923@jingoro.prevmed.sunysb.edu>
Subject: Re: MBUFs and IPFW revisited
In-Reply-To: <xzp90odvxrv.fsf@skejdbrimir.ifi.uio.no> from =?ISO-8859-1?Q?Dag=2DErling_Coidan_Sm=F8rgrav?= at "May 8, 98 12:53:56 pm"
To: dag-erli@ifi.uio.no (Dag-Erling Coidan =?iso-8859-1?Q?Sm=F8rgrav?=)
Date: Fri, 8 May 1998 09:49:16 +0000 (GMT)
Cc: freebsd-net@FreeBSD.ORG
X-Mailer: ELM [version 2.4ME+ PL31H (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-net@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

> Chris Fanning <cfanning@jingoro.prevmed.sunysb.edu> writes:
> > options "NMBCLUSTERS=1024"
> 
> As DG pointed out, the Fine Documentation (otherwise known as Source
> Code, or /usr/src/sys/conf/param.c) is a good place to look for
> information on mbufs. Carfeul reading of the aforementioned file
> uncovers the fact that the default value for NMBCLUSTERS is (512 +
> MAXUSERS * 16). This means that unless you had MAXUSERS set to
> something below 32, setting NMBCLUSTERS to 1024 may not have had the
> effect you intended, since 512 + 32 * 16 = 1024.
> 
> I have plenty of RAM to blow on my home -stable box, so I have
> MAXUSERS set to 64 and NMBCLUSTERS set to 8192.

Good point.  I originally had it set to 2048 (maxusers=20) but I changed
things around seeing if I could get the max number to change.  Of course,
it wouldn't because it was peak, not max. :)

Jingoro's got 128MB RAM which is probably enough for a largish NMBCLUSTERS
setting.  I have to admit, I don't look at the sources much, -stable has
been very kind to me for the 2+ years I've been running it.

Chris

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-net" in the body of the message