`renice`

Set nice values of running processes (POSIX)

Syntax:

renice prioritylevels [-g pgrp...] [-p pid...] [-u user...]

Options:

-g pgrp: Renice processes in this process group.
-p pid: Renice this process.
-u user: Renice processes owned by this user.
prioritylevels: The amount to adjust the priority by. Positive numbers will lower the priority by that many full priority levels, while negative numbers will raise the priority.

Description:

The renice utility adjusts the priority of one or more running processes. The specified prioritylevels is subtracted from the current priority of each selected process.

If you enter:	It will:
a positive value (e.g. `2` or `+2`)	lower the priority of a process, making it "nicer" to other processes
a negative value (e.g. `-2`)	raise the priority of a process, making it "meaner" to other processes

Users may adjust their priority as follows:

If you're:	You can change to any priority:
a normal user	from 1 to 19
a superuser (`root`)	from 1 to 29

Users without appropriate privileges can renice only the processes they own.

Examples:

Lower the priority of process 768 by 2:

    renice 2 -p 768

Exit status:

0: Successful completion.
>0: An error occurred.