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NetBSD 6.1.5 - man page for renice (netbsd section 8)

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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 ...]
     renice -n increment [[-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.

     -n      Instead of changing the specified processes to the given priority, interpret the
	     following argument as an increment to be applied to the current priority of each
	     process.

     -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: 0, the ``base'' scheduling priority; 20, the affected processes will
     run only when nothing at the base priority wants to; anything negative, the processes will
     receive a scheduling preference.

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

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

HISTORY
     The renice command appeared in 4.0BSD.

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.

BSD					   June 9, 1993 				      BSD
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