【12c-OCP】1z0-062考试题库最新考试真题-第28题
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QUESTION 28
In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments.
On further investigation, you f ind that buffer busy waits is caused by contention on data blocks.
Which option would you consider first to decrease the wait event immediately?
A. Decreasing PCTUSED
B. Decreasing PCTFREE
C. Increasing the number of DBWN process
D. Using Automatic Segment Space Management (ASSM)
E. Increasing db_buffer_cache based on t he V$DB_CACHE_ADVICE recommendation
Correct Answer: B
Section: (none)
Explanation
(解析： 因为题目讲的是数据块冲突，没有特别讲明是段头块冲突，所有用答案 B 就可以解决问题。如果是段头块冲突，那么准确答案应该是 D
