Date: Sun, 26 Jan 2003 14:44:10 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Robert Watson <rwatson@FreeBSD.ORG> Cc: Sam Tannous <stannous@employees.org>, freebsd-hackers@FreeBSD.ORG Subject: Re: max simultaneous TCP connections (32,763)? Message-ID: <200301262244.h0QMiA8s069212@apollo.backplane.com> References: <Pine.NEB.3.96L.1030126163650.24134L-100000@fledge.watson.org>
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:
:> I have two freebsd boxes (back to back) and I've been playing with a
:> simple server on one machine and client on the other machine (this was
:> simply an exercise with playing with kqueue). Both the server and the
:> client are single processes and the client seems to stop at 32,763
:> connections.
:>
:> I've modified the port range, tcp keepalive, kern.ipc.somaxconn,
:> maxfiles, maxsockets, nmbclusters. I even tried
:> net.inet.tcp.tcbhashsize (up to 1024).
:>
:> Is there some other parameter I'm missing? Or is this a known
:> limitation/bug?
:
:Some of this has to do with limits on the available ancillary ports for
:out-going connections. Try adding additional IP addresses to the client
:...
:Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
:robert@fledge.watson.org Network Associates Laboratories
It could be a file descriptor limit being hit.
apollo:/home/dillon> sysctl -a | fgrep maxfi
kern.maxfiles: 6120
kern.maxfilesperproc: 5508
test2:/home/dillon> sysctl -a | fgrep maxfi
kern.maxfiles: 12328
kern.maxfilesperproc: 11095
-Matt
Matthew Dillon
<dillon@backplane.com>
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