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Subject: Established connections?
From: Brad Knowles (blkskynet.be)
Date: Wed Sep 06 2000 - 15:42:50 CDT

Folks,

        I'm wondering if any of you can help me figure this out. We have
an inbound mail server that had a bit of a backlog today, so I
reduced the maximum number of smtpd processes that are allowed to
run, ultimately all the way down to 25. While this did restrict the
number of smtpd processes that were running (and leave more out of
the total maximum for smtp outbound), I still saw "established"
connections running as high as 400!

        Is anyone aware of any weirdness with Sun Solaris 2.6 for SPARC
that might cause this kind of a problem, whereas Solaris 7 appears to
be immune?

        Unfortunately for this particular machine, during the time in
question before I took it out of the list of primary MXes, so long as
it had a lot of established connections, it was still getting in a
boatload of mail, causing it to get further and further behind in the
backlog.

        Only after removing it from the list of primary MXes and making
it a secondary only, did I start reducing the amount of mail coming
in to this machine, and allow it to start clearing its backlog.

        Me, I'm completely stumped. 

--
   These are my opinions -- not to be taken as official Skynet policy
======================================================================
Brad Knowles, <blkskynet.be>                || Belgacom Skynet SA/NV
Systems Architect, Mail/News/FTP/Proxy Admin || Rue Colonel Bourg, 124
Phone/Fax: +32-2-706.13.11/12.49             || B-1140 Brussels
http://www.skynet.be                         || Belgium

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