I just finished writing an article on the public, wiki, PFE PerfGuide on the subject of the Page Frame Number database in Microsoft Windows and Windows Server. This little known database is used by the operating system to keep track of the physical memory of the system. Please check it out and update it if necessary.

http://social.technet.microsoft.com/wiki/contents/articles/15259.page-frame-number-pfn-database.aspx