renice - Online in the Cloud

PROGRAM:

NAME

renice - alter priority of running processes

SYNOPSIS

renice [-n] priority [-g|-p|-u] identifier...

DESCRIPTION

renice alters the scheduling priority of one or more running processes. The first
argument is the priority value to be used. The other arguments are interpreted as process
IDs (by default), process group IDs, user IDs, or user names. renice'ing a process group
causes all processes in the process group to have their scheduling priority altered.
renice'ing a user causes all processes owned by the user to have their scheduling priority
altered.

OPTIONS

-n, --priority priority
Specify the scheduling priority to be used for the process, process group, or user.
Use of the option -n or --priority is optional, but when used it must be the first
argument.

-g, --pgrp
Interpret the succeeding arguments as process group IDs.

-p, --pid
Interpret the succeeding arguments as process IDs (the default).

-u, --user
Interpret the succeeding arguments as usernames or UIDs.

-V, --version
Display version information and exit.

-h, --help
Display help text and exit.

EXAMPLES

The following command would change the priority of the processes with PIDs 987 and 32,
plus all processes owned by the users daemon and root:

renice +1 987 -u daemon root -p 32

NOTES

Users other than the superuser may only alter the priority of processes they own, and can
only monotonically increase their ``nice value'' (for security reasons) within the range 0
to 19, unless a nice resource limit is set (Linux 2.6.12 and higher). The superuser may
alter the priority of any process and set the priority to any value in the range -20 to
19. Useful priorities are: 19 (the affected processes will run only when nothing else in
the system wants to), 0 (the ``base'' scheduling priority), anything negative (to make
things go very fast).

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