You are required to change the Data Guard Configuration protection mode from MAXPERFORMANCE to MAXAVAILABILITY using Enterprise Manager Cloud Control. Which two are true about this change?
A.
If the primary database cannot write its redo to at least one synchronized standby database, then the protection level remains unchanged.
B.
The primary database instance will remain up and running, if it cannot write redo to at least one synchronized standby database.
C.
Transactions will not commit until all redo data needed to recover those transactions are written to the online redo log, and to the standby redo log on at least one synchronizes standby database.
D.
Fast start failover can be enabled when making the chance.
E.
Real time apply will be automatically turned on.
C (WRONG). Transactions will not commit until all redo data needed to recover those transactions are written to the online redo log, and to the standby redo log on at least one synchronizes standby database. - this is for Maximum Protection mode
. Under normal operations, transactions do not commit until all redo data needed to recover those transactions has been written to the online redo log AND based on user configuration, one of the following is true:
redo has been received at the standby, I/O to the standby redo log has been initiated, and acknowledgement sent back to primary
redo has been received and written to standby redo log at the standby and acknowledgement sent back to primary
A, B
https://docs.oracle.com/database/121/SBYDB/protection.htm#SBYDB02000
If the primary does not receive acknowledgement from at least one synchronized standby, then it operates as if it were in maximum performance mode to preserve primary database availability until it is again able to write its redo stream to a synchronized standby database.
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ScottL
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