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30 .\" from: @(#)renice.8 8.1 (Berkeley) 6/9/93
31 .\" $NetBSD: renice.8,v 1.12 2003/08/07 11:15:38 agc Exp $
38 .Nd alter priority of running processes
72 scheduling priority of one or more running processes.
75 parameters are interpreted as process ID's, process group
78 a process group causes all processes in the process group
79 to have their scheduling priority altered.
81 a user causes all processes owned by the user to have
82 their scheduling priority altered.
83 By default, the processes to be affected are specified by
92 parameters to be interpreted as process group ID's.
94 Instead of changing the specified processes to the given priority,
95 interpret the following argument as an increment to be applied to
96 the current priority of each process.
100 parameters to be interpreted as user names.
104 interpretation to be (the default) process ID's.
108 .Bd -literal -offset indent
109 renice +1 987 -u daemon root -p 32
112 would change the priority of process ID's 987 and 32, and
113 all processes owned by users daemon and root.
115 Users other than the super-user may only alter the priority of
117 and can only monotonically increase their ``nice value''
118 within the range 0 to
121 (This prevents overriding administrative fiats.)
123 may alter the priority of any process
124 and set the priority to any value in the range
130 Useful priorities are:
131 0, the ``base'' scheduling priority;
132 20, the affected processes will run only when nothing at the base priority
134 anything negative, the processes will receive a scheduling preference.
136 .Bl -tag -width /etc/passwd -compact
138 to map user names to user ID's
150 Non super-users can not increase scheduling priorities of their own processes,
151 even if they were the ones that decreased the priorities in the first place.