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Your Data Guard environment consists of these components and settings: 1. A primary database 2. Two remote physical standby databases 3. The redo transport mode is set to sync 4. Real-time query is enabled for both standby databases 5. The DB_BLOCK_CHECKING parameter is set to TRUE on both standby databases You notice an increase in redo apply lag time on both standby databases. Which two would you recommend to reduce the redo apply lag on the standby databases?
Correct Answer: A,D
To reduce the redo apply lag on standby databases, one could increase the size of the standby redo log files. Larger redo log files can accommodate more redo data, which may reduce the frequency of log switches and allow for more continuous application of redo data. Additionally, lowering the DB_BLOCK_CHECKING parameter to MEDIUM or LOW on the standby databases can help improve redo apply performance. High block checking can impose additional CPU overhead during the application of redo data, potentially increasing apply lag times. By reducing the level of block checking, you can lessen this overhead and help reduce the apply lag .
