RENICE(8) System Manager's Manual RENICE(8)
renice - alter nice value of running processes
/usr/etc/renice priority pid...
/usr/etc/renice priority [ -p pid... ] [ -g pgrp... ] [ -u user-
renice alters the scheduling nice value, and hence the priority, of one
or more running processes. See nice(1) for a discussion of nice value
and process scheduling priority.
By default, the processes to be affected are specified by their process
IDs. priority is the new priority value.
-p pid ... Specify a list of process IDs.
-g pgrp ... Specify a list of process group IDs. The processes in
the specified process groups have their scheduling pri-
-u user ... Specify a list of user IDs or usernames. All processes
owned by each user have their scheduling altered.
Users other than the super-user may only alter the priority of pro-
cesses they own, and can only monotonically increase their "nice value"
within the range 0 to 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 -20 to 19. Useful nice values
are 19 (the affected processes will run only when nothing else in the
system wants to), 0 (the default nice value) and any negative value (to
make things go faster).
If only the priority is specified, the current process (alternatively,
process group or user) is used.
/etc/passwd to map user names to user ID's
If you make the nice value very negative, then the process cannot be
To regain control you must make the priority greater than zero.
Users other than the super-user cannot increase scheduling priorities
of their own processes, even if they were the ones that decreased the
priorities in the first place.
9 September 1987 RENICE(8)