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Date:      Mon, 14 Apr 1997 17:18:09 +0200 (CEST)
From:      Andre Albsmeier <Andre.Albsmeier@mchp.siemens.de>
To:        bag@sinbin.demos.su (Alex G. Bulushev)
Cc:        hackers@freebsd.org
Subject:   Re: mbuf clusters problem in 2.2.1R
Message-ID:  <199704141518.RAA06336@curry.mchp.siemens.de>
In-Reply-To: <199704111115.PAA11170@sinbin.demos.su> from "Alex G. Bulushev" at "Apr 11, 97 03:15:42 pm"

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> we use p6-200 with two 3940UW and fxp (100baseT fullduplex) 256M RAM
> under fbsd 2.2.1R
> 
> system reboots once per 2-6 days with out of mbuf clusters diagnostic
> on console ... we use maxusers=256 without any effect, then we
> increase NMBCLUSTERS to 8192 and then to 12288 with the same effect ...
> 
> while working, number of allocated mbuf clusters permanently increase
> (some mbufs not freeing?) and then system crashed ...
> 
> this effect exists only on system with big network traffic ...
> now we run:
> squid - up to 200 connection simultaneously
> ircd  - up to 50 connection
> cvsupd ...

I have got similar weird things.i I often see this in the logfiles:

Apr 11 13:07:28 server kern.info /kernel: nfsd send error 55
Apr 11 13:07:28 server last message repeated 719 times
Apr 11 13:07:28 server kern.err /kernel: Out of mbuf clusters - increase maxusers!
Apr 11 13:07:28 server kern.info /kernel: nfsd send error 55
Apr 11 13:07:28 server last message repeated 21 times
Apr 11 13:07:28 server kern.crit /kernel: 55
Apr 11 13:07:28 server kern.info /kernel: nfsd send error 55
Apr 11 13:07:28 server last message repeated 743 times
Apr 11 13:07:29 server kern.crit /kernel: 55
Apr 11 13:07:29 server kern.info /kernel: nfsd send error 55
Apr 11 13:07:29 server last message repeated 743 times

>From time to time the machine reboots without any other messages or
console errors. This only appears on a machine with 3 network cards
and heavy net traffic. What I found curiuos is the line: /kernel: 55.
I have changed kernel options, network cards, memory, motherboard, ...
no change. This is a 2.2.1 system which serves a lot of PCs. During
the night everything is sane but when the PCs are running the dmesg
fills with "nfsd send error 55" and occasionaly crashes occur.

I have no clue where to start or what to change...

	-Andre



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