http://technet.microsoft.com/en-us/library/aa996719.aspx Paging file size -- Paging file size Equal to the amount of RAM in the server plus 10 MB This paging file size recommendation accounts for the amount of memory needed to collect information if the operating system fails. By default, if the operating system fails, it will copy everything in memory to a .dmp file. That file can be examined later to determine the cause of the failure. To be able to copy everything that is stored in memory, you must have a paging file size that can hold everything in memory, plus some additional space to gather the data. ExBPA reports ---PageFile Size Larger Than Total Physical Memory The Microsoft Exchange Analyzer Tool queries the Win32_PageFile Windows® Management Instrumentation (WMI) class to determine the value for the MaximumSize key. This key represents the current configured maximum page file size. The Exchange Analyzer also
