Improve server performance
Consider the following tips to improve the performance of your server.
Enable the Apache PageSpeed module or the Varnish web application accelerator if not already enabled.
Consider installing the APCu, XCache, memcached or eAccelerator modules to cache and optimize your PHP applications.
Use the mysqltuner script to check and optimize your MySQL or MariaDB database server configuration.
If you are experiencing bot attacks that are affecting your server, use the Apache configuration file to filter out and deny requests by specified IP address.