It is about 6 months now that I have switch to mpm-event from mpm-worker
I really didn’t have any problems with mpm-worker but I wanted to boost performance since I read too many good articles about mpm-event that is a optimized version of mpm-worker so it is wise to upgrade to the optimized version
to compile directadmin with mpm-event first edit apache configuration file
then go to /usr/local/directadmin/custombuild/ and rebuild apache and php
if you encountered this error
Starting httpd: AH00534: httpd: Configuration error: No MPM loaded.
you just need to rebuild httpd.conf configureation file by using the following command