Blocks_Per_Page=n

    Specifies a new page size for the storage area to which it is
    applied. You cannot decrease the page size of a storage area, and
    you cannot change the size of a storage area with a uniform page
    format.

    You might want to increase the page size in storage areas
    containing hash indexes that are close to full. By increasing
    the page size in such a situation, you prevent the storage area
    from extending.

    The Blocks_Per_Page qualifier is a positional qualifier.