Syntax option:

    CLEAN BUFFER COUNT IS buffer-count BUFFERS

    Specifies the number of buffers to be kept available for
    immediate reuse.

    The default is five buffers. The minimum value is one; the
    maximum value can be as large as the buffer pool size.

    You can override the number of clean buffers by defining the
    logical name RDM$BIND_CLEAN_BUF_CNT. For information about how to
    set the values, see the Oracle Rdb7 Guide to Database Performance
    and Tuning.