The
general database parameter RESTART_SHUTDOWN determines whether database instance modes should be changed automatically or not.The database parameter only takes effect if you are using a Windows operating system (NT, 2000, XP).
Since the shutdown of an operating system is subject to a time limit, it may interrupt the automatic shutdown of a database instance, particularly if you are working with large database instances where a high volume of data is being changed.
If you restart the database after the shutdown was interrupted, you must import log entries to restore the database instance. We therefore recommend you set the database parameter RESTART_SHUTDOWN to