"media recovery is not required"
*Cause: The THROUGH LAST SWITCHOVER clause of the ALTER DATABASE RECOVER
MANAGED STANDBY DATABASE was specified and the database has been
recovered to the most recent End-Of-Redo marker. All known archived
logs have been applied. Managed recovery is not required.
*Action: No action is necessary. The standby database may be activated as
a new primary or may continue as a standby.