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Which memory conservation technique allows the secure elimination of redundant copies of memory pages between virtual machines on the host?
A. VMkernel Swap
B. Memory Balloon Driver
C. RAM Overcommit
D. Transparent Page Sharing
Correct Answer: D
Explanation/Reference:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1021095
Transparent page sharing is a method by which redundant copies of pages are eliminated. This helps to free memory that a virtual machine would otherwise be using. Because of the way TPS works with hardware-assisted memory virtualization systems like Intel EPT Hardware Assist and AMD RVI Hardware Assist, esxtop may show zero or few shared pages in these systems. Page sharing will show up in esxtop only when host memory is overcommitted. The rest of this article provides background and details.
