Incremental

    Directs Oracle RMU to verify database pages that have changed
    since the last full or incremental verification. Oracle RMU
    stores timestamps in the database root file for both full
    and incremental verifications. To determine which pages
    have changed since the last verify operation, Oracle RMU
    compares these timestamps with the page timestamps. The page
    timestamps are updated whenever pages are updated. An incremental
    verification performs the same number of I/O operations as a
    full verification, but the incremental verification takes fewer
    CPU cycles than a full verification, allowing you to perform
    incremental verifications more frequently than you would perform
    full ones. The default is to perform a full verification.

                                   NOTE

       If you use the Incremental qualifier with the RMU Verify
       command, Oracle Corporation recommends that you use it only
       with the All qualifier and not with any other qualifiers.

       The timestamps in the database root file are updated during
       full and incremental verifications only when the All
       qualifier is specified. Therefore, if you do not specify
       the All qualifier, two successive incremental verifications
       of the same storage area of the database perform the same
       verifications. This means that the second incremental
       verification does not pass over pages verified by the first
       incremental verification, contrary to what you might expect.

    See the Usage Notes entry in this command for the rules that
    determine which qualifiers can be used in combination on the same
    RMU Verify command line.

    If the Incremental qualifier is not specified, all requested
    pages are verified, regardless of the timestamp.