RENICE(8) OpenBSD System Manager's Manual RENICE(8)NAMErenice - alter priority of running processes
SYNOPSISrenice-n increment [[-g] pgrp ...] [[-p] pid ...] [[-u] user ...]
DESCRIPTIONrenice alters the scheduling priority of one or more running processes by
increment. Processes may be selected using the parameters pid (process
ID), pgrp (process group ID), and user (user name or ID). If no flag is
specified, the default is to select by process ID.
Users other than the superuser 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 superuser 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).
The options are as follows:
-g pgrp ...
Alter the scheduling priority of all processes in process group
pgrp.
-n increment
A positive or negative decimal integer used to modify the
scheduling priority.
-p pid ...
Alter the scheduling priority of process pid.
-u user ...
Alter the scheduling priority of all processes belonging to user,
which may be a user name or ID.
FILES
/etc/passwd for mapping user names to user IDs
EXIT STATUS
The renice utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The following example changes the priority of process IDs 987 and 32, and
all processes owned by users daemon and root:
# renice-n +1 987 -u daemon root -p 32
SEE ALSOnice(1), getpriority(2), setpriority(2)STANDARDS
The renice utility is compliant with the IEEE Std 1003.1-2008 (``POSIX'')
specification.
The historical behavior of passing the increment as the first argument is
supported for backwards compatibility.
The arguments to flags [-gpu] are extensions to that specification.
HISTORY
The renice command appeared in 4.0BSD.
BUGS
Non-superusers cannot increase scheduling priorities of their own
processes, even if they were the ones that decreased the priorities in
the first place.
OpenBSD 4.9 September 29, 2010 OpenBSD 4.9
