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單項(xiàng)選擇題

Which statement is true about a running session that belongs to the online transaction processing (OLTP) group?（）

A. It permanently switches to the low_group consumer group if the session exceeds 10,000 I/O requests or 2,500 MB of data transfer.
B. It performs the first 10000 I/O requests or 2,500 MB of data transfer in the LOW-GROUP consumer group, and then switches to the original group.
C. It switches to the LOW_GROUP consumer group if the session exceeds 10000 I/O requests or 2500 MB of data transfer and returns to the original group after the operation.
D. It switches to the LOW_GROUP consumer group if the session exceeds 10000 I/O requests or 2500MB of data transfer for queries, but not for data manipulation language (DML) operations.

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單項(xiàng)選擇題

View the Exhibit exhibit1 to examine the series of SQL commands. View the Exhibit exhibit2 to examine the plans available in the SQL plan baseline. The baseline in the first row of the Exhibit is created when OPTIMIZER_MODE was set to FIRST_ROWS.
Which statement is true if the SQL query in exhibit1 is executed again when the valueof OPTIMIZER_MODE is set to FIRST_ROWS?（）

A. The optimizer uses a new plan because none of the plans in the exhibit2 are fixed plans.
B. The optimizer uses the plan in the second row of the exhibit2 because it is an accepted plan.
C. The optimizer uses the plan in the first row of the exhibit2 because it is the latest generated plan.
D. The optimizer uses the plan in the first row of the exhibit2 because OPTIMIZER_MODE was set to FIRST_ROW during its creation.

多項(xiàng)選擇題

Which two statements about workload capture and replay operations are true?（）

A. The clients must be created manually on the test machines to perform more realistic testing.
B. Restart the database in RESTRICTED mode before beginning workload replay to enable a clean state for workload replay.
C. Restart the database in RESTRICTED mode before beginning workload capture to enable a clean state for capturing the workload.
D. The application state of the capture system must be identical to the application state of the replay system when the workload replay begins.

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