Date: Tue, 08 May 2007 15:01:03 -0300 From: "Marc G. Fournier" <scrappy@freebsd.org> To: freebsd-stable@FreeBSD.ORG, Oliver Fromme <olli@lurza.secnetix.de> Subject: Re: Socket leak (Was: Re: What triggers "No Buffer Space) ?Available"? Message-ID: <FC123478A023D5E5B7043D76@ganymede.hub.org> In-Reply-To: <200705081314.l48DETdC084404@lurza.secnetix.de> References: <200705081314.l48DETdC084404@lurza.secnetix.de>
next in thread | previous in thread | raw e-mail | index | archive | help
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
- --On Tuesday, May 08, 2007 15:14:29 +0200 Oliver Fromme
<olli@lurza.secnetix.de> wrote:
> What kind of jails are those? What applications are
> running inside them? It's quite possible that the
> processes on one machine use 120 sockets per jail,
> while on a different machine they use only half that
> many per jail, on average. Of course, I can't tell
> for sure without knowing what is running in those
> jails.
The all run pretty much the same thing, on all the machines ... by default,
standard syslog, sshd, cron, cyrus imapd, postfix and apache ... some run
aolserver over top of that, or jdk/tomcat, or zope ... but they aren't specific
to the server itself, as they get moved around ...
> > kern.ipc.numopensockets: 7400
> > kern.ipc.maxsockets: 12328
> >
> > ps looks like:
> >
<stuff deleted>
> 2368 p2 Is+ Sat01PM 0:00.03 /bin/tcsh > root 2112 0.0 0.1 5220
> 2360 p3 Ss+ Sat01PM 0:00.04 /bin/tcsh > root 91221 0.0 0.1 5140
> 2440 p4 Ss+ 11:49PM 0:00.12 -tcsh (tcsh)
>
> I don't think those processes should consume 7400 sockets.
> Indeed, this really looks like a leak in the kernel.
Robert has sent me a suggestion to try that I'm in the process of putting
together right now, involving backing out some work on uipc_usrreg.c ...
> Maybe "sockstat -u" and/or "fstat | grep -w local" (both
> of those commands should basically list the same kind of
> information). My guess is that the output will be rather
> short, i.e. much shorter than 7355 lines. If that's true,
> it is another indication that the problem is caused by
> a kernel leak.
at the time I rebooted, with no processes, but 7400 sockets:
> wc -l sockstat.out.txt
12 sockstat.out.txt
> grep local fstat.out.txt | wc -l
7
- ----
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email . scrappy@hub.org MSN . scrappy@hub.org
Yahoo . yscrappy Skype: hub.org ICQ . 7615664
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (FreeBSD)
iD8DBQFGQLrf4QvfyHIvDvMRAqlWAJ9Dg2J55e6YVAzkfC9mGascFfr+JQCeJpWo
uXAZtN0WbyKdM4a12WJjszs=
=BA7G
-----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?FC123478A023D5E5B7043D76>