Why Apache start compile new process if few of them already exists?
I have heavy scripts where perl load many libraries and I see Apache re-load and recompile whole code every few requests.
If all running interpreters are in use, mod_perl will clone new interpreters to handle the request, up until this number of interpreters is reached. when PerlInterpMax is reached, mod_perl will block (via COND_WAIT()) until one becomes available (signaled via COND_SIGNAL()). Default value: 5