[tlug] Assigning Multiple CPU Cores to a VirtualBox

[CL <az.4tlug@example.com>]

Thinking and wondering time which cannot be verified by searching the 
Oracle site or asking for help there.  Maybe someone here knows an answer:

I was looking at ways to speed up the dreadfully slow performance of my 
WIN7 VBox and tried increasing the number of available cores from one 
core to four (out of eight) and increasing memory from 1Gb to 4Gb (out 
of 16).  It has seemed to speed up nearly everything in WIN with the 
exception of multiple-overwrite-of-unused-space HDD cleaning which 
continues to crawl along but can be lived with.  I am not noticing any 
degrading of performance of my Debian desktops but was wondering whether 
assigning multiple CPU cores and extra memory in a VBox cedes exclusive 
full time control of those cores and memory to the VBox.  Nothing I can 
find in the Oracle user information specifically says "No, it doesn't" 
and the "user community " (sic) is all over the place on what it 
believes.  I _have_ rejected the suggestion to burn dried sage in a dish 
next to the PC case, though.

Asking because I have a Big Crunchy Project (tm) on the near horizon and 
didn't want to learn that it did after the fact.

--
CL