Oracle : Ошибка ORA-16819


16819, 0000, "fast-start failover observer not started"
*Cause: The observer for fast-start failover was not started. As a
result, fast-start failover could not happen in the case of
a primary database failure.
*Action: Start the fast-start failover observer by using, for example, the
DGMGRL START OBSERVER command.

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