# ionice

> Get or set program I/O scheduling class and priority.
> Scheduling classes: 1(realtime), 2(best-effort), 3(idle).
> Priority levels: 0(the highest) - 7(the lowest).

- Set I/O scheduling class of a running process

`ionice -c {{scheduling_class}} -p {{pid}}`

- Run a command with altered I/O scheduling class and priority

`ionice -c {{scheduling_class}} -n {{priority}} {{command}}`

- Print the I/O scheduling class and priority of a running process

`ionice -p {{pid}}`