Hi, the file you are looking for is /etc/httpd/conf.modules.d/00-mpm.conf
and I added to this:
<IfModule mpm_event_module>
ServerLimit 16
StartServers 8
MinSpareThreads 25
MaxSpareThreads 75
ThreadLimit 64
ThreadsPerChild 25
MaxRequestWorkers 400
MaxConnectionsPerChild 3000
</IfModule>
for example. I put this under the line that loads the module for mpm_event. Obviously you can set what appropriate options you need than my example. You can verify config changes before restarting Apache with:
apachectl configtest