ionice from util-linux 2.27.1

Usage: ionice [options] -p <pid>... ionice [options] -P <pgid>... ionice [options] -u <uid>... ionice [options] <command> Show or change the I/O-scheduling class and priority of a process. Options: -c, --class <class> name or number of scheduling class, 0: none, 1: realtime, 2: best-effort, 3: idle -n, --classdata <num> priority (0..7) in the specified scheduling class, only for the realtime and best-effort classes -p, --pid <pid>... act on these already running processes -P, --pgid <pgrp>... act on already running processes in these groups -t, --ignore ignore failures -u, --uid <uid>... act on already running processes owned by these users -h, --help display this help and exit -V, --version output version information and exit For more details see ionice(1).