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Post new topic   Forum Index -> Apache View previous topic :: View next topic
Reply to topic   Topic: Can't apply process slot
Author
al0000



Joined: 29 Jan 2007
Posts: 24
PostPosted: Wed 16 Jul '08 16:26    Post subject: Can't apply process slot Reply with quote
Hello,

My configuration is the following:

Windows 2003 SP2
MySQL 5.0.51b-community-nt
PHP 5.2.6
eAccelerator 0.9.5.3
Apache 2.2.9
cgi-fcgi

ThreadsPerChild 400
MaxRequestsPerChild 30000

<IfModule mod_fcgid.c>
MaxRequestsPerProcess 500
DefaultMaxClassProcessCount 250
IdleTimeout 60
</IfModule>

My website is based on Mambo and generates about 200.000 pageviews per day.

Problem is that, every now and then, the website stops responding (sending 500 internal server error) and i can see tons of these on the apache log:

Wed Jul 16 16:22:24 2008] [warn] mod_fcgid: can't apply process slot for D:/www/****.com/public/index.php
[Wed Jul 16 16:22:25 2008] [warn] mod_fcgid: can't apply process slot for D:/www/****.com/public/index3.php
[Wed Jul 16 16:22:26 2008] [warn] mod_fcgid: can't apply process slot for D:/www/****.com/public/index3.php
[Wed Jul 16 16:22:26 2008] [warn] mod_fcgid: can't apply process slot for D:/www/****.com/public/index3.php
[Wed Jul 16 16:22:27 2008] [warn] mod_fcgid: can't apply process slot for D:/www/****.com/public/index3.php
[Wed Jul 16 16:22:27 2008] [warn] mod_fcgid: can't apply process slot for D:/www/****.com/public/index.php
[Wed Jul 16 16:22:28 2008] [warn] mod_fcgid: can't apply process slot for D:/www/****.com/public/index3.php
[Wed Jul 16 16:22:29 2008] [warn] mod_fcgid: can't apply process slot for D:/www/****.com/public/index3.php


Today, the website was offline for more than 1 hour because of this. I had to kill all php-cgi.exe instances and restart apache.

What could cause this?
Any ideas how to fix it?

Thanx.
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James Blond
Moderator


Joined: 19 Jan 2006
Posts: 7373
Location: Germany, Next to Hamburg
PostPosted: Thu 17 Jul '08 9:21    Post subject: Reply with quote
Please read mod_fcgid doesn't honor IdleTimeout, MaxRequestsPerProcess
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al0000



Joined: 29 Jan 2007
Posts: 24
PostPosted: Thu 17 Jul '08 11:25    Post subject: Reply with quote
Hmm..

So there's basically no solution for me?
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James Blond
Moderator


Joined: 19 Jan 2006
Posts: 7373
Location: Germany, Next to Hamburg
PostPosted: Thu 17 Jul '08 11:45    Post subject: Reply with quote
There is! If you read the full thread you read that you have to set an variable that the process ends and a new one can start. Also you need to define
MaxProcessCount.

If you still have a question please post again.
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al0000



Joined: 29 Jan 2007
Posts: 24
PostPosted: Thu 17 Jul '08 11:54    Post subject: Reply with quote
James Blond wrote:
There is! If you read the full thread you read that you have to set an variable that the process ends and a new one can start. Also you need to define
MaxProcessCount.

If you still have a question please post again.


Thank you for your reply.

However, I'm a bit confused.
Which variable is that?

The default number for MaxProcessCount is 1000
I will set it to 3000.

I will also set DefaultMaxClassProcessCount from 100 to 300
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James Blond
Moderator


Joined: 19 Jan 2006
Posts: 7373
Location: Germany, Next to Hamburg
PostPosted: Thu 17 Jul '08 15:24    Post subject: Reply with quote
without setting DefaultMinClassProcessCount 0 the php process never dies.
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al0000



Joined: 29 Jan 2007
Posts: 24
PostPosted: Thu 17 Jul '08 15:26    Post subject: Reply with quote
James Blond wrote:
without setting DefaultMinClassProcessCount 0 the php process never dies.


Understood.

I will make the changes and get back with results.

Thanx!
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al0000



Joined: 29 Jan 2007
Posts: 24
PostPosted: Fri 18 Jul '08 18:08    Post subject: Reply with quote
Still, the issue remains:



[Fri Jul 18 16:31:36 2008] [notice] Child 13648: Waiting 240 more seconds for 70 worker threads to finish.
[Fri Jul 18 16:31:36 2008] [warn] mod_fcgid: can't apply process slot for D:/www/******.com/public/index3.php
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al0000



Joined: 29 Jan 2007
Posts: 24
PostPosted: Fri 18 Jul '08 18:10    Post subject: Reply with quote
This is the configuration i'm using now:

ThreadsPerChild 400
MaxRequestsPerChild 30000

<IfModule mod_fcgid.c>
MaxRequestsPerProcess 500
DefaultMaxClassProcessCount 250
IdleTimeout 60
MaxProcessCount 2000
DefaultMinClassProcessCount 0
</IfModule>
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al0000



Joined: 29 Jan 2007
Posts: 24
PostPosted: Tue 22 Jul '08 13:21    Post subject: Reply with quote
This continues and puts down my website for hours

Could anyone think of what could cause this error???

[Tue Jul 22 14:20:29 2008] [warn] mod_fcgid: can't apply process slot for D:/www/xxxxxx.com/public/index3.php
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PipoDeClown



Joined: 20 Dec 2005
Posts: 77
PostPosted: Thu 24 Jul '08 19:40    Post subject: Reply with quote
try install Process Explorer or something,
inspect if Apache really can handle your 400 threads per child,
check memory usage,
tell more what happened before u get that error,
does the same also happens without eaccelerator? or with different settings?
does it happen with the default settings for mod_fcgid?
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