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Date:      Thu, 21 May 1998 21:37:44 -0700
From:      David Greenman <dg@root.com>
To:        Mark Mayo <mark@vmunix.com>
Cc:        isp@FreeBSD.ORG, hackers@FreeBSD.ORG
Subject:   Re: TIME_WAIT/FIN_WAIT_2... 
Message-ID:  <199805220437.VAA28329@implode.root.com>
In-Reply-To: Your message of "Thu, 21 May 1998 23:09:48 EDT." <19980521230948.A23199@vmunix.com> 

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>Hi all.. I have a few questions about large web servers. I've run a
>few relatively large web sites on freebsd in the past, but none that
>put out more than 300-400,000 objects per day (html+gif..). I've been
>looking at a Solaris machine today that's putting out about 2 million
>pages a day. The somewhat odd thing is the extraordinary number of
>sockets left open in TIME_WAIT and FIN_WAIT_2. I roughly understand
>what they mean, but we're talking about 3000 entries here (about 400-500
>of which are FIN_WAIT_2, the rest are TIME_WAIT).. So I have ~3000
>sockets in TIME_WAIT/FIN and only about 100 ESTABLISHED.
>
>Is this normal?? It doesn't seem like it to me. If not, what would be
>causing it, and what should I look at tuning on the Slowaris box??
>
>TIA for any ideas! All I know is that I just don't trust sockets on
>Solaris... :-)

   It's normal and required by the TCP specification. FreeBSD will do the
same thing in the this situation.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

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