Nginx, PHP-FPM & MariaDB MySQL

How Centmin Mod Nginx enables and configures Nginx ngx_pagespeed module http://centminmod.com/nginx_ngx_pagespeed.html

To troubleshooting Nginx Pagespeed when certain filters do not do what you expect them to do you should first enable the pagespeed messages and console features outlined at http://centminmod.com/nginx_ngx_pagespeed.html#pagespeedconsole.