LinuxQuestions.org - renice (positive or negative)

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renice (positive or negative)

I'm using this command to lower a process CPU usage:
renice -5 pid
But today I doubt if it decrease the CPU usage or increase it.
Please explain a little more about it.

thanks

Smaller values will mean that the process gets more favorable scheduling, so '-5' is likely to increase the CPU allocation to that process.

Hi,

As stated in the man page:

Quote:

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), any-
thing negative (to make things go very fast).

In short + (plus) -> process runs slower and - (minus) -> process runs faster

Hope this helps.

Hi,

Remember process with a lower nice numbers run faster