The RMU Close command closes an open database. A database root
    file is considered open if it has been specified in a previous
    RMU Open command or has active users attached to it.

    You can close the database immediately by specifying the Abort
    qualifier, or you can allow current users to finish their session
    by specifying the Noabort qualifier.

    If you have specified manual opening for your database (with
    the OPEN IS MANUAL clause of the SQL ALTER DATABASE statement),
    you must use the RMU Open command to manually open the database
    before any users can invoke it and the RMU Close command to
    manually close the database.

    If you have specified automatic opening for your database
    (with the OPEN IS AUTOMATIC clause of the SQL ALTER DATABASE
    statement), the RMU Close command affects current database users
    only. Current processes are detached from the database but they
    and new processes can immediately reattach to the database.

    Use the RMU Show Users command to display information about
    databases currently in use on your node. Use the RMU Dump Users
    command to display information about databases currently in use
    on your cluster.