Configure Multi-Processing modules contains two parts. First I override default Apache configuration for event mode that I picked during compilation. In that case you will know what is actually configured. So let’s start with that first.

At the bottom of httpd.conf you need to uncomment the line:

Include conf/extra/httpd-mpm.conf

It will enable advanced Apache httpd MPM configuration and it will override the defaults.

Now edit enabled file:

sudo vi /usr/local/apache2/conf/extra/httpd-mpm.conf

This file contains configuration of all MPM There are configuration for each MPM module, so make sure that you are setting correct values. I enabled event mode, so this is the section I care about:

<IfModule mpm_event_module>
StartServers 5
MinSpareThreads 75
MaxSpareThreads 250
ThreadsPerChild 25
MaxRequestWorkers 400
MaxConnectionsPerChild 0
</IfModule>