----- Original Message ----- From: "Victor Duchovni" <victor.ducho...@morganstanley.com>
To: <postfix-users@postfix.org>
Sent: Monday, March 23, 2009 5:57 PM
Subject: Re: Mail drop


On Mon, Mar 23, 2009 at 05:54:07PM -0400, Brandon Hilkert wrote:

dkim-milter is one program that you are asking to sign lots of
messages in parallel. To implement parallelism, dkim-milter uses
mutiple threads in one process. To keep the threads from tripping
over each other, dkim-milter uses locks. With a bit of bad luck,
your DKIM requests are blocking each other.

Is there nothing I can do to either improve or prevent this?

MEASURE! Find out what is slowing it down. When you know what that
is, ask the question again.

What are the best tools to get a feel for hardware performance and utilitization? Top, atop, vmstat ?

As you can probably tell, I don't have much experience working with Linux. If you feel like this is a question not worth the time, then don't feel like you have to respond.


--
Viktor.

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