renice(1M)							    renice(1M)

NAME    [Toc]    [Back]

     renice - alter priority of	running	processes

SYNOPSIS    [Toc]    [Back]

     /etc/renice [ -n increment	| priority ] [ [ -p ] pid ... ]
	  [ [ -g ] pgrp	... ] [	[ -u ] user ...	]

DESCRIPTION    [Toc]    [Back]

     renice alters the scheduling priority of one or more running processes.
     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.

     The -n increment specifies	how the	system scheduling priority of the
     specified process(es) is to be adjusted.  The increment option-argument
     is	a positive or negative decimal integer that is used to modify the
     system scheduling priority	of the specified process(es).  The priority
     value is taken as the actual system scheduling priority, rather than as
     an	increment to the existing scheduling priority.

     The parameters are	interpreted as process ID's, process group ID's, or
     user names	as follows.  By	default, the processes to be affected are
     specified by their	process	ID's.  To force	parameters to be interpreted
     as	process	group ID's, the	-g option can be used.	To force the
     parameters	to be interpreted as user names, the -u	option can be used.
     Supplying -p resets interpretation	to be (the default) process ID's.  For
     example,

	  /etc/renice +1 987 -u	daemon root -p 32

     changes the priority of process ID's 987 and 32, and all processes	owned
     by	users daemon and root.

     Users other than the superuser can	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 superuser can	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 run only when nothing else in the system
	  wants	to.

     0	  The ``base'' scheduling priority.

     anything negative
	  Make things go very fast.

FILES    [Toc]    [Back]

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





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renice(1M)							    renice(1M)

SEE ALSO    [Toc]    [Back]

     getpriority(2), setpriority(2).


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