Hi,
Changes are the VMkernel is using large pages to back the virtual memory pages.
For more information, this article from Duncan will provide enough information and links to other articles about this topic:
http://www.yellow-bricks.com/2011/01/26/re-large-pages-gabvirtualworld-frankdenneman-forbesguthrie/
In short VMkernel will place the pages issued by the virtual machine in large pages on physical memory to speed up memory access. Large pages are used when the physical CPU that has EPT(Intel) or RVI(AMD) capabilities.