OCP-1Z0-053-V12.02-71题

71.The Automatic Database Diagnostic Monitor (ADDM) analysis runs every 60 minutes on your

database. Your database is facing a series of interrelated problems over a period of two hours. You need

to ensure that the ADDM analysis is run over a time span of two hours in future. What would you do?

A. Create two custom ADDM tasks.

B. Modify the AWR snapshot time interval to two hours.

C. Create a new scheduler window for a time period of two hours.

D. Modify the Automatic Workload Repository (AWR) snapshot retention period to two hours.

Answer: B

答案解析：

参考：http://blog.youkuaiyun.com/rlhua/article/details/12683525

ADDM 在记录每个AWR 快照之后会自动运行。每次记录快照后，ADDM 会分析与最后两个快照对应的时段。ADDM 会预先监视实例，以便在大多数瓶颈问题成为严重问题之前检测到这些问题。多数情况下，ADDM 会为检测到的问题提供建议解决方案，甚至可以量化这些建议的优势。