You might have too many httpd processes running on your system during development.
Screenshot of httpd processes haven taken over the machine.
Objective: Reduce the amount of spare httpd servers that apache will maintain in memory.
Purpose: Since this is for local development purposes it’s not likely that the number of users will exceed 256 clients.
These are the internal default configuration for Apache sets its configuration. This section will not exist in your httpd.conf file unless you already created it prior.
Insert/replace the following in httpd.conf – File->Edit Template->Apache->httpd.conf
This will reduce the amount of spare httpd processes in memory and reduce the amounts of threads used by the processor. This will improve your overall system performance, reduce energy and battery usage as well.