Date: Fri, 8 May 1998 09:49:16 +0000 (GMT) From: Chris Fanning <cfanning@jingoro.prevmed.sunysb.edu> To: dag-erli@ifi.uio.no (Dag-Erling Coidan =?iso-8859-1?Q?Sm=F8rgrav?=) Cc: freebsd-net@FreeBSD.ORG Subject: Re: MBUFs and IPFW revisited Message-ID: <199805080949.JAA11923@jingoro.prevmed.sunysb.edu> 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"
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> 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
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