The GLOBAL BUFFERS ARE ENABLED clause specifies that Oracle Rdb
    maintain one global buffer pool per node in the cluster for each
    database. By default, Oracle Rdb maintains a local buffer pool for
    each user. For more than one user to use the same page, each
    must read it from disk into their local buffer pool. When the
    GLOBAL BUFFERS ARE ENABLED clause has been specified, a page
    in the global buffer pool may be read by more than one user at
    the same time, although only one user reads the page from disk
    into the global buffer pool. Global buffering provides improved
    performance because I/O is reduced and memory is better utilized.

    The default is GLOBAL BUFFERS ARE DISABLED, in which Oracle Rdb
    maintains a local buffer pool for each user, and global buffers
    are not enabled.