Use the Drupal modules that inhibit performance, selectively

Use ps -aux | sort -u and netstat -anp | sort -u to check the SURFHVVHV DnG WKHLU UHVRuUFH FRnVuPSWLRn. ,I yRu finG WKDW WKH ASDFKH SURFHVV VLzH LV unGuOy KLgK, WKH fiUVW VWHS LV WR disable unnecessary modules on the production servers to free memory. Modules like Devel are required only in your development environment and can be removed altogether. After you have disabled unnecessary processes and removed unnecessary modules, run the top command again to check if the changes you have made have taken effect.