FastCGI + PHP + APC on Apache2 - Concurrency issues

Hello,

I am not sure this is actually a FastCGI, Apache2 or PHP configuration
issue, but here is my problem:

I have the current configuration in my apache2:

Alias /cgi-bin/ /www/cgi-bin/
FastCgiServer /www/cgi-bin/php-fcgi -processes 1 -idle-timeout 180 -socket
/tmp/fastcgi.socket
AddType application/x-httpd-fastphp .php
Action application/x-httpd-fastphp /cgi-bin/php-fcgi

And that wrapper:

#!/bin/sh
PHP_FCGI_CHILDREN=4
export PHP_FCGI_CHILDREN
PHP_FCGI_MAX_REQUESTS=500
export PHP_FCGI_MAX_REQUESTS
exec /usr/local/bin/php


When I start apache, this gives me the correct number of processes:

www-data  3422  3421  0 04:59 ?        00:00:00  \_ /usr/sbin/fcgi-pm -k
start -DSSL
www-data  3423  3422  0 04:59 ?        00:00:00  |   \_ /usr/local/bin/php
www-data  3424  3423  0 04:59 ?        00:00:00  |       \_
/usr/local/bin/php
www-data  3425  3423  0 04:59 ?        00:00:00  |       \_
/usr/local/bin/php
www-data  3426  3423  0 04:59 ?        00:00:00  |       \_
/usr/local/bin/php
www-data  3427  3423  0 04:59 ?        00:00:00  |       \_
/usr/local/bin/php
www-data  3428  3421  0 04:59 ?        00:00:00  \_ /usr/sbin/apache2 -k
start -DSSL
www-data  3429  3421  0 04:59 ?        00:00:00  \_ /usr/sbin/apache2 -k
start -DSSL
www-data  3430  3421  0 04:59 ?        00:00:00  \_ /usr/sbin/apache2 -k
start -DSSL
www-data  3431  3421  0 04:59 ?        00:00:00  \_ /usr/sbin/apache2 -k
start -DSSL
www-data  3432  3421  0 04:59 ?        00:00:00  \_ /usr/sbin/apache2 -k
start -DSSL
www-data  3434  3421  0 04:59 ?        00:00:00  \_ /usr/sbin/apache2 -k
start -DSSL


I am using only 1 FastCgiServer process because it is required to benefit
from the APC cache between the different php handlers. The problem is that
I cannot seem to handle more than 1 php request at a time.

This is a script I am using to test that:

print date("Y-m-d H:i:s"); print "<br />";
sleep(10);
print date("Y-m-d H:i:s"); print "<br />";

If I request that script 3 times, within the same second, it returns me:

2006-10-17 05:02:35
2006-10-17 05:02:45

2006-10-17 05:02:45
2006-10-17 05:02:55

2006-10-17 05:02:55
2006-10-17 05:03:05

It waits for the previous script to be done to start the next request. Am
I doing something wrong in my configuration? I would expect my server to
be able to handle more thant 1 request at a time :-)

Actually this acts the same if I increase the FastCgiServer's -process...

Thanks!

Regards,
Renaud



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