Thresholds=(n,n,n)

    Specifies new SPAM thresholds for the storage area to which it is
    applied (for a mixed page format storage area). The thresholds of
    a storage area with a uniform page format cannot be changed.

    See the Oracle Rdb7 Guide to Database Performance and Tuning for
    information on setting SPAM thresholds.

    The Thresholds qualifier is a positional qualifier.