irix - renice (1)

     renice - alter priority of	running	processes

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

     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 will be 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, a -g may be	specified.  To force the parameters to
     be	interpreted as user names, a -u	may be given.  Supplying -p will reset
     interpretation to be (the default)	process	ID's.  For example,

	  /etc/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).

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

     getpriority(2), setpriority(2)