This is the default example configuration of mpm_prefork.conf provided by Apache. This config file was generated by Apache running on Ubuntu 18.04.
It is located under: /etc/apache2/mods-available/mpm_prefork.conf
# prefork MPM
# StartServers: number of server processes to start
# MinSpareServers: minimum number of server processes which are kept spare
# MaxSpareServers: maximum number of server processes which are kept spare
# MaxRequestWorkers: maximum number of server processes allowed to start
# MaxConnectionsPerChild: maximum number of requests a server process serves
<IfModule mpm_prefork_module>
StartServers 5
MinSpareServers 5
MaxSpareServers 10
MaxRequestWorkers 150
MaxConnectionsPerChild 0
</IfModule>
# vim: syntax=apache ts=4 sw=4 sts=4 sr noet
Download the raw file with wget or curl
wget -O mpm_prefork.conf.example http://exampleconfig.com/static/raw/apache/ubuntu18.04/etc/apache2/mods-available/mpm_prefork.conf
curl http://exampleconfig.com/static/raw/apache/ubuntu18.04/etc/apache2/mods-available/mpm_prefork.conf > mpm_prefork.conf.example
Other config files you might find useful