This option is enabled by default.Ĭorrupted Controlfile Enabled by default, the detection of controlfile corruption will result in immediate failover. This option is enabled by default.Ĭorrupted Dictionary Failover is initiated if corruption of a critical database object is found. Some of the below circumstance it will start Failoverĭatafile Offline Failover is initiated if a datafile on the primary database experiences an I/O error resulting in a datafile being taken offline. it will issue a failover after waiting the number of seconds specified by the FastStartFailoverThreshold property.The Observer is a component of the DGMGRL interface that is configured on a system outside the systems actually running the Oracle Data Guard configuration, which monitors the availability of the primary database.The key to this feature is a monitoring process appropriately named the Observer.Fast-Start Failover enables the broker to perform these tasks automatically failover to standby database.This feature increases the availability of the database by eliminating the need for DBA involvement as part of the failover process.
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