renice(1) - phpMan

RENICE(1) BSD General Commands Manual RENICE(1)

NAME
renice - alter priority of running processes

SYNOPSIS
renice priority [[-p] pid ...] [[-g] pgrp ...] [[-u] user ...]

DESCRIPTION
Renice alters the scheduling priority of one or more running processes. The following who
parameters are interpreted as process ID's, process group ID's, 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. By default, the processes to be affected are specified by their process
ID's.

Options supported by renice:

-g Force who parameters to be interpreted as process group ID's.

-u Force the who parameters to be interpreted as user names.

-p Resets the who interpretation to be (the default) process ID's.

For example,

renice +1 987 -u daemon root -p 32

would change the priority of process ID's 987 and 32, and all processes owned by users dae-
mon and root.

Users other than the super-user may only alter the priority of processes they own, and can
only monotonically increase their ``nice value'' within the range 0 to PRIO_MAX (20). (This
prevents overriding administrative fiats.) The super-user may alter the priority of any
process and set the priority to any value in the range PRIO_MIN (-20) to PRIO_MAX. Useful
priorities are: 20 (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).

FILES
/etc/passwd to map user names to user ID's