| RENICE(8) | System Manager's Manual | RENICE(8) | 
renice —
| renice | priority [[ -p]
      pid ...] [-gpgrp ...] [-uuser ...] | 
| renice | -nincrement
      [[-p] pid ...]
      [-gpgrp ...]
      [-uuser ...] | 
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, 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-n-u-pFor 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: 0, the ``base'' scheduling priority; 20, the affected processes will run only when nothing at the base priority wants to; anything negative, the processes will receive a scheduling preference.
renice command appeared in
  4.0BSD.
| December 6, 2012 | NetBSD 9.4 |