Message-ID: <3F01C1B0.9030901@us.ibm.com>
Date: Tue, 01 Jul 2003 10:15:28 -0700
From: Nivedita Singhvi <niv@us.ibm.com>
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To: John Salmon <jsalmon@thesalmons.org>
CC: "David S. Miller" <davem@redhat.com>, linux-net@vger.kernel.org,
       linux-kernel@vger.kernel.org, kuznet@ms2.inr.ac.ru, jmorris@redhat.com
Subject: Re: negative tcp_tw_count and other TIME_WAIT weirdness?
References: <200307010025.h610PGmX007656@river.fishnet>	<20030701.012107.42800729.davem@redhat.com> <m3brwedvd9.fsf@river.fishnet>
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John Salmon wrote:

> Another question - is there any chance that this bug could be
> responsible for a slowdown in network processing.  Some of my machines
> get themselves into a state in which their ability to serve
> network traffic (they're running squid) is significantly reduced -
> perhaps by a factor of two.  I wish I had more specific data, but at
> this point it's a mystery.  What I'm really wondering is whether
> there's any chance at all that this kernel bug could be behind my
> performance problem, or should I look elsewhere.
> 
> TIA,
> John Salmon

John, thanks for the earlier info you gave me, but
could you also give us your netstat -s output? For
example, are you seeing a lot of tcp memory pressure?
aborts? failures?

thanks,
Nivedita


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