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Date:      Wed, 24 Jun 1998 03:05:27 -0700 (PDT)
From:      Jaye Mathisen <mrcpu@internetcds.com>
To:        Terry Lambert <tlambert@primenet.com>
Cc:        hackers@FreeBSD.ORG
Subject:   Re: NFS send error 55 for fs:
Message-ID:  <Pine.NEB.3.95.980624030058.513A-100000@schizo.cdsnet.net>
In-Reply-To: <199806240915.CAA23568@usr08.primenet.com>

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I'm on a box with a fxp ethernet (2 of them), to a 100MB full-duplex hub,
from there to a Network Appliance.

I NFS mount the Netapp on many of my boxes, this is the only one that
complains.  The mail server running 2.2.5 doesn't complain, and the 3.0
boxes don't, just this one.

The network interface has no errors, no collisions.  The hub shows nothing
wrong either.  There's a pretty constant stream of data to the netapp,
no pauses in netstat output that I can see.

I'll bump nmbclusters, and see if it helps.  I notice that I'm running
nfsiod -n 16, and all the nfsiod's are accumulating CPU time.

On some of the lesser pounded-on servers, the last 4-5 don't get any CPU
time...

Just to see if I'm going crazy, I rebooted the 3.0 box that was 
the old INN server, and plugged in the cables, and it doesn't have
the problem at all.  Just cranks along...

I can always go to 3.0 I guess, the UP stuff seems pretty solid, but
I'd rather stay on -stable on production machines.

On Wed, 24 Jun 1998, Terry Lambert wrote:

> > OK, but which buffer is it out of?  MAXUSERS is set to 128.  Is this
> > an NMBCLUSTERS fix thingie?  MSIZE?  NBUF?  
> 
> NMBCLUSTERS.
> 
> I'm betting this is a server death, resulting in all local buffers
> being used up.
> 
> If you have a ppp connection, you can do the same thing by turning off
> your modem, and starting a "ping" to bring the link up.  Pretty quick
> way to screw your system.
> 
> You should look at the underlying problem, which is probably hardware.
> 
> Are you using a 10/100 card, supposedly in 100 mode, supposedly it's
> being autodetected?  A number of cards have problems with this; Doug
> Ambrisko would be able to fill you in...
> 
> 
> 					Terry Lambert
> 					terry@lambert.org
> ---
> Any opinions in this posting are my own and not those of my present
> or previous employers.
> 


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