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RENICE(8)                 BSD System Manager's Manual                RENICE(8)

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.  'ing a process group causes all processes in
     the process group to have their scheduling priority altered.  '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 :

     -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 daemon 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), any-
     thing negative (to make things go very fast).

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

SEE ALSO
     nice(1), getpriority(2), setpriority(2)

BUGS
     Non super-users can not increase scheduling priorities of their own pro-
     cesses, even if they were the ones that decreased the priorities in the
     first place.

HISTORY
     The renice command appeared in 4.0BSD.

4th Berkeley Distribution        June 9, 1993        4th Berkeley Distribution