WHM for VPS
From JumbaWiki
Web Host Manager (WHM) for a VPS (Virtual Private Server) is very different from a reseller account as there are many functions to control the server. Some of these functions include restarting the server, restarting services such as Apache, the SQL service and FTP service as well as the VPS/server configuration. This guide will explain how to manage the Web Host Manager in a Virtual Private Server.
Managing CPU/Server load
The server load viewable in the cpanel is represented as a decimal number with 1.00 being 100% and 0.50 being 50%. You will find a list of background processors can be found under System Health->Show Current CPU Usage. When viewing the cpu usage don't be alarmed by the whm service at the top which will have a high cpu usage as a lot of cpu is required to display that list and that cpu usage is displayed as one item.
Apache HTTP Service
The Apache http service also known as the httpd service can sometimes come to a crawl after mass cron jobs or a simple infinit loop in a server side script (eg. php). If your website seems very slow and you know you have few visitors on your server then restarting the Apache http service can usually do the trick. This is providing of course Apache was your problem. To find out exactly what service is playing up you can go to the menu->System Health->Show Current CPU Usage. When viewing the cpu usage don't be alarmed by the whm service at the top which will have a high cpu usage as a lot of cpu is required to display that list and that cpu usage is displayed as one item.
SQL Service
The SQL service is for MySQL and you may notice over time the SQL server will chew a lot of cpu. This can be because the SQL service is been used very often. The more often the MySQL service has been used the more cpu it will take for future queries especially if there hasn't been much of a break between queries. However note that when the sql service uses a lot of cpu it can use 1.00 (100%) cpu for one query. To overcome this bug all you need to do is first restart the apache service to close and mysql requests then restart the SQL service. Both of these services can be restarted in the Restart Services section of the main menu.
