This screen graphically displays, in general terms, the
    effectiveness of the global buffer pool for sharing of pages.
    This screen contains the following fields of header information:

    o  Total Global Buffers- indicates the total number of buffers in
       the database global buffer pool.

    o  Maximum Global Buffer Pages- indicates the maximum number
       of pages that can reside in the global buffer pool. The
       actual number of pages may be less than this value because
       of different page sizes for different storage areas.

    o  Number of Unused Buffers- indicates the number of buffers that
       are completely empty and do not contain ANY pages. This field
       should always display the value "0"; any other value indicates
       that the global buffer pool may be sized too large for the
       currently running application.

    o  Number of Active Pages- indicates the actual number of pages
       contained in the global buffer pool; this value will probably
       be less than the Maximum Global Buffer Pages field. Active
       pages can include unreferenced pages.

    o  Number of Unused Pages- indicates the number of pages in the
       global buffer pool that are not currently referenced by any
       process.

    o  Number of Unshared Pages- indicates the number of pages in the
       global buffer pool referenced by exactly one process.

    The histogram graphically displays the number of processes
    referencing each page in the global buffer pool. Because of the
    limited space on the histogram, each asterisk ("*") may represent
    more than one page; the actual number of pages represented is
    identified in the footer information.

    This screen is not saved in the binary output file and cannot be
    selected during binary file replay.