Can you define load (Processor usage, RAM usage, total # of processes, etc.) Also, what program/method do you want to use to find this information? Command line, through PHP, or something else?
You can also to a "top" command to see how many processes are running and which ones are causing the most bottleneck
If you have a linux server then you can use "top -c" command via SSH to see the running processes on your linuxserver. In advance, use ps -auxf httpd (it will show you all the running httpd processes). You can kill unwanted processes using kill -9 processID