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Date: Sun, 29 Aug 2010 17:52:01 -0400
To: Andre Oppermann <andre@freebsd.org>
From: Mike Tancsa <mike@sentex.net>
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Cc: freebsd-stable@freebsd.org
Subject: Re: syncache errors
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At 03:10 PM 8/29/2010, Andre Oppermann wrote:
>On 29.08.2010 19:16, Mike Tancsa wrote:
>>At 11:33 AM 8/29/2010, Andre Oppermann wrote:
>>>On 29.08.2010 16:09, Mike Tancsa wrote:
>>>>After upgrading to a recent STABLE, I have been seeing the 
>>>>following sporadic errors
>>>>
>>>>Aug 28 04:15:15 smarthost2 kernel: TCP: [xx.yy.165.120]:53617 to 
>>>>[xx.yy.164.50]:25; syncache_socket:
>>>>Socket create failed due to limits or memory shortage
>>>>
>>>>this is with
>>>>FreeBSD 8.1-STABLE #7: Wed Aug 25 15:32:05 EDT 2010
>>>>and the previous kernel was from July 20th.
>
>When sendmail is deferring the connections it should not show up
>in the syncache logs.  The accept() by sendmail is much later than
>when the socket for a new connection is created in syncache.  Here
>it points to the limits in the listen queue.  Maybe sendmail is
>getting behind in accepting new connections and the listen queue
>is overflowing.

How would I track that down to confirm it ?

         ---Mike