RENICE(8)		  BSD System Managers 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 IDs, process
     group IDs, or user names.	Reniceing a process group causes all pro
     cesses in the process group to have their scheduling priority altered.
     Reniceing 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 IDs.

     Options supported by renice:

     -g      Force who parameters to be interpreted as process group IDs.

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

     -p      Resets the who interpretation to be (the default) process IDs.

     For example,

     renice +1 987 -u daemon root -p 32

     would change the priority of process IDs 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 IDs

SEE ALSO
     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.
     The Linux kernel (at least version 2.0.0) and linux libc (at least ver
     sion 5.2.18) does not agree entierly on what the specifics of the system
     call interface to set nice values is.  Thus causes renice to report bogus
     previous nice values.

HISTORY
     The renice command appeared in 4.0BSD.

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