Get or set the priority of a process
ps_get_nice() returns the current priority, ps_set_nice() sets a
new priority, ps_windows_nice_values() list the possible priority
values on Windows.
ps_windows_nice_values() ps_get_nice(p = ps_handle()) ps_set_nice(p = ps_handle(), value)
p |
Process handle. |
value |
On Windows it must be a string, one of the values of
|
Priority values are different on Windows and Unix.
On Unix, priority is an integer, which is maximum 20. 20 is the lowest priority.
On Windows you can only set the priority of the processes the current
user has PROCESS_SET_INFORMATION access rights to. This typically
means your own processes.
On Unix you can only set the priority of the your own processes. The superuser can set the priority of any process.
On Unix you cannot set a higher priority, unless you are the superuser. (I.e. you cannot set a lower number.)
On Unix the default priority of a process is zero.
ps_windows_nice_values() return a character vector of possible
priority values on Windows.
ps_get_nice() returns a string from
ps_windows_nice_values() on Windows. On Unix it returns an integer
smaller than or equal to 20.
ps_set_nice() return NULL invisibly.
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