"Event to disable populating V$RMAN_OUTPUT"
*Cause: This event disables the dbsm_backup_restore function
createRmanOutputRow (the function will be no op).
In order to limit size of rows in V$RMAN_OUTPUT and to delete the
entire V$RMAN_OUTPUT, use the named event KRBMROR_LIMIT. If the
level of that event is 1, then size of the V$RMAN_OUTPUT view will
be zero, so the function createRmanOutputRow will signal ORA-19901.
If the level is bigger than 1, then level*256 is maximum number of
the rows in the V$RMAN_OUTPUT fixed view.