[mod_python] remnant 'orphan' apache subprocesses

> Are CGI scripts used anywhere at all on your Apache web site?

No, only mod_python and serving static files.

> -----Original Message-----
> From: Graham Dumpleton [mailto:graham.dumpleton at gmail.com]
> Sent: Monday, January 21, 2008 10:07 PM
> To: Alec Matusis
> Cc: mod_python at modpython.org
> Subject: Re: [mod_python] remnant 'orphan' apache subprocesses
> 
> Are CGI scripts used anywhere at all on your Apache web site?
> 
> On 22/01/2008, Alec Matusis <matusis at yahoo.com> wrote:
> > > What version of Apache are you using?
> >
> > 2.2.6
> >
> > > What Python web application are you running on top of mod_python, a
> > > self built one or one that uses one of the larger web frameworks?
> >
> > Only self-built stuff, nothing complicated.
> >
> > > Does your application create sub processes in any way to perform
> > > additional work?
> >
> > No sub processes and no threads, except that we use MySQLdb module
> (which
> > might create threads?).
> >
> > I noticed a warning in the error log:
> > /live/scripts/_pro.py:100: Warning: Rows matched: 1  Changed: 1
> Warnings: 1
> > (this is a mysql warning), but I would not think this is relevant...
> >
> >
> > > -----Original Message-----
> > > From: Graham Dumpleton [mailto:graham.dumpleton at gmail.com]
> > > Sent: Monday, January 21, 2008 9:22 PM
> > > To: Alec Matusis
> > > Cc: mod_python at modpython.org
> > > Subject: Re: [mod_python] remnant 'orphan' apache subprocesses
> > >
> > > What version of Apache are you using?
> > >
> > > What Python web application are you running on top of mod_python, a
> > > self built one or one that uses one of the larger web frameworks?
> > >
> > > Does your application create sub processes in any way to perform
> > > additional work?
> > >
> > > Graham
> > >
> > > On 22/01/2008, Alec Matusis <matusis at yahoo.com> wrote:
> > > > I have been investigating a memory leak that occurs on  an apache
> > > server
> > > > since we switched to worker MPM.
> > > > I found that the source of it are apache subprocesses that lose
> track
> > > of
> > > > their parent and never exit:
> > > >
> > > > root at web10 ~> ps -ef | grep httpd
> > > > root     16197     1  0 02:00 ?        00:00:09
> > > > /usr/local/encap/httpd/bin/httpd -f /p2/web/conf/web10.conf -k
> start
> > > > nobody   17750     1  0 17:53 ?        00:00:00
> > > > /usr/local/encap/httpd/bin/httpd -f /p2/web/conf/web10.conf -k
> start
> > > > nobody    5112 16197  4 20:02 ?        00:00:16
> > > > /usr/local/encap/httpd/bin/httpd -f /p2/web/conf/web10.conf -k
> start
> > > > nobody    5159 16197  4 20:02 ?        00:00:15
> > > > /usr/local/encap/httpd/bin/httpd -f /p2/web/conf/web10.conf -k
> start
> > > > nobody    5300 16197  4 20:03 ?        00:00:14
> > > > /usr/local/encap/httpd/bin/httpd -f /p2/web/conf/web10.conf -k
> start
> > > >
> > > >
> > > > in this output, apache child pid 17750 has pid 1 as a parent, and
> it
> > > is one
> > > > of those 'zombie children'.
> > > > Pids 5112,  5159, 5300 were normal (parent is pid 16197), and
> they
> > > exited
> > > > after MaxRequestsPerChild was reached.
> > > >
> > > > Does anybody have any advice on this? I cannot correlate this to
> > > anything,
> > > > there's nothing interesting in the server error log.
> > > > These 'zombies' appear at a rate of 2-3 per day; this apache
> serves
> > > about
> > > > 350 requests per second.
> > > >
> > > > This Apache configuration is
> > > >
> > > > ServerLimit 40
> > > > ThreadLimit 70
> > > >
> > > > StartServers 10
> > > > MaxClients 1600
> > > > MinSpareThreads 75
> > > > MaxSpareThreads 200
> > > > ThreadsPerChild 40
> > > > MaxRequestsPerChild 10000
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > _______________________________________________
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> > > >
> >
> >