[TriLUG] Python-Mailman question

[Chris Hedemark]

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On Thursday, May 1, 2003, at 04:53 PM, Sinner from the Prairy wrote:

> I'm using PMP (Pyhton-Mailman-Postfix) on a Red Hat box. Postfix runs 
> fast and
> great. Python is there, being used by Mailman... and Mailman is slow. 
> It's
> objectively slow: it takes around 6 minutes to deliver a message to a 
> mailing
> list... and when gets a que of messages for a mailing list, it uses up 
> as
> much CPU as it can grab.

Sinner, is this on uhura?  If so, that is a definite degredation from 
its original performance.  Something has changed.  Performance was 
wicked fast when I left.

Have you done any investigation of /var/log/maillog?  Look at the 
timestamps and see where the big gap is.

Also, while a message is being processed by mailman, check out "top" 
and "iostat -x 1" to see if it is a CPU, memory or disk bottleneck.  
You already mentioned it is grabbing CPU, and to some extent this is 
normal (though for only a few moments in most cases).

I know y'all are doing *lots* of crypto on that box;  is the CPU 
generally in a state of high utilization?  If so, it might be worth 
popping a soekris card in there and patching OpenSSL to offload crypto 
to the hardware accelerator.
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