Number of processors flag in command line rendering?

[vuegroup]

There used to be a -n flag for the number of processors a render could access.
It appears this has been dropped from the maya command line render flags.
Is there some other flag that limits the the cores/processors a vray render is able to use?
I would like to be able to do something else on my machine while the vray command line batch render is happening in the background.

Thanks in advance
mung

[vlado]

For Maya batch mode it's "-threads N"; you can get all the options with "Render -r vray -help". For V-Ray Standalone it's -numThreads=N

Best regards,
Vlado