Date: Fri, 9 Jan 2004 11:58:50 +0100 From: Thorsten Greiner <thorsten@tgreiner.net> To: Andre Oppermann <andre@freebsd.org> Cc: current@freebsd.org Subject: Re: the TCP MSS resource exhaustion commit Message-ID: <20040109105850.GA1803@tybalt.nev.psi.de> In-Reply-To: <3FFE8232.730F70B8@freebsd.org> References: <20040109085522.GB4246@tybalt.nev.psi.de> <3FFE8232.730F70B8@freebsd.org>
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* Andre Oppermann <andre@freebsd.org> [2004-01-09 11:34]:
> You can simply increase net.inet.tcp.minmssoverload to any
> higher value. I suggest 2,000 as next step. If set it to
> 0 the check will be disabled entirely.
>=20
> This makes we wonder why the Oracle database server is sending
> so many small packets. Is your JBoss application doing connection
> pooling (eg. multiplexing multiple SQL sessions over one tcp
> session)?
>=20
> The documentation for these sysctl's is on its way.
Thanks for your response, I will try your suggestion soon. In the
meantime I have found another problem: remote login via ssh, do a
'tar tvf largefile.tar' and you are out:
Jan 9 11:54:41 tybalt kernel: too many small tcp packets from
XX.XX.XX.XX:5632, av. 215byte/packet, dropping connection
The destination machine is the same SUN database server I mentioned
above and I have not applied the sysctl changes you suggested.
Regards
-Thorsten
--=20
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