php-cgi frozen with sbwait when SMP enable

[Ken Chen]

I think the parent php-cgi are very health. I have tried:

There are total 49 php-cgi processes are running or frozen, the '1 wait' is
parent .

web4# ps alx | grep php-cgi | grep -v grep | awk '{print $9}' | sort | uniq
-c | sort -n
   1 biowr
   1 wait
  15 sbwait
  32 accept

Kill one of frozen php-cgi processes.

web4# kill -9 61392

Check again the amount of php-cgi processes, there are still 49 php-cgi
procerss.

web4# ps alx | grep php-cgi | grep -v grep | awk '{print $9}' | sort | uniq
-c | sort -n
   1 biord
   1 bo_wwa
   1 wait
   4 -
  17 sbwait
  25 accept

2008/11/10 Anton - Valqk <lists at lozenetz.org>

> Oh, just saw that, this could be caused by dead parent php-cgi processes
> (just a guess).
> I used to run lighttpd with span-fcgi executable and it happens very
> often to have dead parents (of php-cgi childs) that must be killed by
> killall php-cgi (eg. restart _ALL_ php-cgi processes, pretty stupid!!!
> but if you have dead parent you can't know which childs to kill)...
> If you run your php-cgi processes just from the lighttpd(and lighttpd
> manages php-cgi processes) try running it with fcgi-spawn and write a
> script to check parents of the php-cgi backends and you'll see if that's
> the cause of having 'hang' phps :(
>
> pls tell me what is it. I'm interested!
>
> cheers,
> valqk.
> Ken Chen wrote:
> > Hi Jeremy,
> >
> > A health FastCGI process have a lifetime, so the PIDs of all php-cgi
> > processes should in a short range.
> >
> > There are some 'php-cgi' fall in 'sbwait' state, and stay there forever.
> The
> > frozen 'php-cgi' can't accept new request, so never retire.
> >
> > Please forgive my poor English.
> >
> > 2008/11/7 Jeremy Chadwick <koitsu at freebsd.org>
> >
> >
> >> On Fri, Nov 07, 2008 at 07:29:37PM +0800, Ken Chen wrote:
> >>
> >>> Hello,
> >>>
> >>> I have 4 web servers with lighttpd to serve one web site with DNS load
> >>> sharing.  On the 2 SMP-enable web servers, there will be many php-cgi
> >>>
> >> frozen
> >>
> >>> in 'sbwait' state every day. It means the php-cgi stay in 'sbwait'
> state,
> >>> and never be back to 'accept' or other state. If I restart them, there
> >>>
> >> will
> >>
> >>> be frozen php-cgi appear some hours later.
> >>>
> >>> There is no problem on the other single CPU web servers which running
> >>>
> >> same
> >>
> >>> php scripts and same configuration and version of PHP.
> >>>
> >>> Why and any solution?
> >>>
> >> I'm not understanding what the problem is (and I've seen the output you
> >> provided later in the thread).  Are you stating the problem is that you
> >> see many php-cgi processes?  Or are you worried they're not doing
> >> anything?  Does the website function, lock up, or anything like that?
> >> If not, what's the issue?  :-)
> >>
> >> --
> >> | Jeremy Chadwick                                jdc at parodius.com |
> >> | Parodius Networking                       http://www.parodius.com/ |
> >> | UNIX Systems Administrator                  Mountain View, CA, USA |
> >> | Making life hard for others since 1977.              PGP: 4BD6C0CB |
> >>
> >>
> >>
> > _______________________________________________
> > freebsd-stable at freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> > To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org
> "
> >
> >
>
>