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Date: Tue, 3 Jun 2008 10:23:27 -0400
From: Bill Moran <wmoran@potentialtech.com>
To: Nicolas Haller <nicolas@boiteameuh.org>
Message-Id: <20080603102327.7629a042.wmoran@potentialtech.com>
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References: <20080603140219.GB19003@boiteameuh.org>
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Cc: freebsd-questions@freebsd.org
Subject: Re: The machine which does nothing
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In response to Nicolas Haller <nicolas@boiteameuh.org>:

> Hi all,
> 
> I have a very strange problem with a machine. The box have a postfix
> which give e-mail to an amavisd-new and deliver ham to mailboxes.
> 
> The problem is the mail queue grow but the machine doesn't work at full
> capacity. CPU is 90% idle, vmstat don't see proc are waiting for
> anything, disks are playing poker and there is a lot of RAM available.
> 
> The machine have this problem under freebsd 6.3 and 7.0-RELEASE with a
> bi-Xeon Quad core.

amavisd and postfix do a lot of stuff.  Could be timing out on DNS or
other networking issues.  Grab a tcpdump while it's running and see
if any networking is taking an extraordinary amount of time.

-- 
Bill Moran
http://www.potentialtech.com