From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from pi.att ([199.191.58.37]) by gl; Thu Apr 11 10:52:22 EDT 2013
Message-ID: <3748dfae418a7f1152775fe2f0d90d23@9front.org>
List-ID: <9front.9front.org>
X-Bullshit: flexible object-oriented API descriptor-scale SQL configuration template
Date: Thu, 11 Apr 2013 09:52:05 -0500
From: sl@9front.org
To: 9front@9front.org
Subject: cs/dns woesMIME-Version: 1.0
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I'm consistently seeing some strange behavior from cs
and dns on cat-v.org. Tons of cs/dns procs are getting
(seemingly) stuck in Pwrite/Pread and never dying.
The number keeps building until the machine slows
to a crawl and I can no longer even cpu into it.

For example, right now:

	cpu% ps|grep -e ' cs'|wc -l
	     20

	cpu% ps|grep -e ' dns'|wc -l
	     60

The system is still useable but from recent experience
this will keep building until things become unuseably
slow. I did some traces in acid:

One of the cs procs stuck in Pwrite:

	http://okturing.com/src/1639/body

One of the dns procs stuck in Pread:

	http://okturing.com/src/1638/body

I think this is being triggered by mail messages, either
incoming or outgoing. I'm running another mlmgr list
that developed the same problem as what happened
with the 9front list when I was offline, moving -- people
were receiving numerous multiple copies of every message
sent to the list. After rebooting the flood of messages
seemed to stop. I suspect there is a connection here...
somewhere.

-sl