How to alter the priority of running processes
Answer:
The basic syntax is as the following
renice {priority} pid
Where priority range from -20 to 19 (lowest priority)
For example, to set the priority of pid 755 to -19, try
sudo renice 19 755
If you want to set by process name instead of pid, you can use
sudo renice 19 `pgrep apache2`
Where apache2 is the process name you want to set.
