（162）View the Exhibit to examine the output produced by the following query at three different times since the database instance started

and has undergone workloads of different capacities:

SQL>SELECT substr(component, 0, 10) COMP, current_size CS, user_specified_size US FROM v$memory_dynamic_components WHERE current_size !=0;

What do you infer from this?






A. All sessions are connected to the database instance in dedicated mode,and no RMAN or parallel query operations have been performed.

B. The database instance is running with manual shared memory management.

C. The database instance is running with manual PGA management.

D. The database instance has the MEMORY_TARGET value set to a nonzero value.

答案：（D）

解析：

因为SGA Target和PGA Target的值在变动，说明使用的自动内存管理，即MEMORY_TARGET初始化参数设置为非0值。