Hello,
I'm using Apache 2.2.22 with mod_fcgid 2.3.6 and PHP 5.3
Our server should be able to serve more than 4000 concurrent PHP-requests.
When testing with e.g.
ab -c 2000 -n 10000 http://...
mod_fcgid will always create a maximum of 1024 threads only:
[] pstree
|-apache2---1024*[php5-cgi]
But my config says:
FcgidMaxProcesses 4000
FcgidMaxProcessesPerClass 4000
<IfModule mpm_worker_module>
StartServers 2
ServerLimit 160
MinSpareThreads 25
MaxSpareThreads 75
ThreadLimit 64
ThreadsPerChild 25
MaxClients 4000
MaxRequestsPerChild 0
</IfModule>
I think it's not coincidence that the maximum is exactly 1024.
But I'm unable to find the source of this maximum.
The system-, suexec- and apache-logs show no errors.
Nonetheless I increased some internal limits like the maximum process
count or the maximum open files, but with no luck.
This is driving me crazy. From where comes the limit of 1024?
Have I missed something?
Thanks in advance,
Tobias
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