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You must propose an Oracle Data Guard configuration for a database supporting a DSS workload that meets these permanent requirements:
1. The performance impact on the primary database should be kept to a minimum.
2. Creating and maintaining materialized views should not impact the performance of the primary database.
Additionally, there are these requirements, only the one of which is ever done at any one time:
3. It should be possible to apply designated patches with a minimum amount of downtime.
4. Upgrading to a new database release should be performed with the least possible amount of downtime.
5. New application software releases should be tested against an exact up-to-date replica of the production database.
You propose a configuration operating in Maximum Performance mode with a primary database and one logical standby database.
Which requirements do you meet?
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? (Choose two.)
Maximum Availability
This protection mode provides the highest level of data protection that is possible without compromising the availability of a primary database. Transactions do not commit until all redo data needed to recover those transactions has been written to the online redo log and to at least one synchronized standby database.
If the primary database cannot write its redo stream to at least one synchronized standby database, 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.
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? (Choose two.)
Use Data Guard Redo Apply Best Practices
To improve the Redo Apply rate of a physical standby database (and media recovery):
* Set DB_CACHE_SIZE to a Value Greater than on the Primary Database
* Set DB_BLOCK_CHECKSUM=FULL and DB_BLOCK_CHECKING=MEDIUM or FULL
* Maximize I/O Rates on Standby Redo Logs and Archived Redo Logs
* Assess Recovery Rate
* Assess Database Wait Events
* Tune I/O Operations
* Assess System Resources
References:
https://docs.oracle.com/database/121/HABPT/config_dg.htm#HABPT4904
Examine this command executed on a physical standby database to transition it to a logical standby database:
SQL> ALTER DATABASE RECOVER TO LOGICAL STANDBY prodlgsby;
Which statement is true regarding the execution of this command?
The Oracle database 12c Observer is currently running on host1 and you wish to have it running on host2.
Examine this list of possible steps:
1) Stop the observer on host1.
2) Disable Fast-Start Failover.
3) Update the broker configuration with the new observer hostname.
4) Enable Fast-Start Failover.
5) Start the Observer on host2.
Which contains the minimum required steps to move the observer to host2?
