Get or Set UNIX Priority (Niceness) of this R process.
The UNIX priority, also called niceness, what the
Sets the priority of itself, the unix process that is executing this
R code. The command was written for use with the
package (for nicing slaves), using syntax something like
assuming a cluster
cl has already been set up. It may also
be useful in other situations.
get.my.priority returns the priority.
set.my.priority returns no value. It has the side effect
of setting the priority.