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February 18, 2013, at 01:29 AM
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!!!renice - alter priority of running processes
renice -n priority [options] <pid> [...]
Renice alters the scheduling priority of one or more running processes.
The following who parameters are inter-preted as process ID's, process group 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.
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'' (for security reasons) within the range
0 to PRIO_MAX (20), unless a nice resource limit is set (Linux 2.6.12 and higher).
The super-user may alter the priority of any process and set the prior‐ity 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)
Page last modified on February 18, 2013, at 01:29 AM