Turn off KeepAlive to reduce Apache RAM usage

Apache will attempt to keep idle processes running rather than constantly start new processes.  Typically Apache config file is /etc/httpd/conf/httpd.conf or /etc/apache2/conf/httpd.conf.  It does vary between distributions.

Change KeepAlive On -> KeepAlive Off

or if there is no KeepAlive option already simply add:

KeepAlive Off

 

Note: This will reduce RAM usage, but will increase CPU usage slightly as Apache will be starting new child processes more frequently.