(Alpha and I64 only.) The Show Virtual Memory Statistics routine
    returns the statistics accumulated from calls to LIB$GET_VM_
    64/LIB$FREE_VM_64 and LIB$GET_VM_PAGE_64/LIB$FREE_VM_PAGE_64.

    Format

      LIB$SHOW_VM_64  [code] [,user-action-procedure]

                      [,user-specified-argument]