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Date:      Sat, 08 Nov 2008 19:20:51 +0100
From:      Ivan Voras <ivoras@freebsd.org>
To:        freebsd-stable@freebsd.org
Subject:   Re: php-cgi frozen with sbwait when SMP enable
Message-ID:  <gf4lab$c1m$1@ger.gmane.org>
In-Reply-To: <d018a9bd0811070708r1479656bk46e9c21295cce6ba@mail.gmail.com>
References:  <d018a9bd0811070329s30b463b0m6885e1f568217b89@mail.gmail.com>	<gf1bc5$lbu$1@ger.gmane.org>	<d018a9bd0811070610t6eaa5b08l4b59cc1857e2fbd1@mail.gmail.com>	<gf1kka$oj6$1@ger.gmane.org> <d018a9bd0811070708r1479656bk46e9c21295cce6ba@mail.gmail.com>

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Ken Chen wrote:
> I capture something.
>=20
> Please check the PID 57776. It's CPU time never change since my previou=
s
> mail here.
>=20
> web4# ps alx | grep php-cgi | grep -v grep | grep sbwait
> 65534 57776 47240   0   4  0 182328 84984 sbwait I     ??    2:02.12
> /usr/local/bin/php-cgi

You're right and it is strange. I don't know why this would happen but
some things that come to mind are:

* Does lighttpd have some kind of status page or a diagnostic utility to
show you the states of FastCGI processes?
* Does lighttpd have a facility to "reap" old PHP processes? For
example, mod_fcgid has a maximum lifetime setting for FastCGI processes.
* You could try sending a SIGABRT to the php-cgi process to get a core
dump and inspect it. Without debugging symbols it will probably give you
the name of the function it's been waiting in.


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