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.  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 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), anything negative (to make things go very fast).

FILES

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

SEE ALSO

     getpriority(2), setpriority(2)

BUGS

     Non super-users can not increase scheduling priorities of their own processes, 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 version 5.2.18) does not agree entierly on what the specifics of the sys-
     temcall 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