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RENICE(8)               FreeBSD System Manager's Manual              RENICE(8)

NAME
     renice - alter priority of running processes

SYNOPSIS
     renice [priority | [-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, user 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 or user
             ID's.

     -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 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).

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

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

STANDARDS
     The renice utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY
     The renice command appeared in 4.0BSD.

BUGS
     Non super-users cannot increase scheduling priorities of their own
     processes, even if they were the ones that decreased the priorities in
     the first place.

FreeBSD 11.0-PRERELEASE          June 9, 1993          FreeBSD 11.0-PRERELEASE

NAME | SYNOPSIS | DESCRIPTION | FILES | SEE ALSO | STANDARDS | HISTORY | BUGS

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