I believe that I properly configured Apache MPM as worker under Ubuntu 13.10, including PHP-FPM and FCGI, and disabled mod_php. When I run top I can clearly see multiple Apache (~2-3 MB) and php (~ 25-30 MB) processes running, which increase with users/requests.
Now, what is puzzling me is that when I check with a2query -M returns:
prefork
Or with apachectl -V :
Server MPM: prefork
threaded: no
forked: yes (variable process count)
Is this OK? Or did I miss something along the setup?