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45. Which statement is true about the Manageability Monitor (MMON) background process?

A.It transfers statistics from memory to disk at regular intervals.

B.It coordinates the rebalance activity for disk groups when ASM is used.

C.It communicates with the Automatic Storage Management (ASM) instance on behalf of the database

instance.

D.It performs dynamic memory management when Automatic Shared Memory Management is enabled

for the database instance.

Answer: A  

答案解析：

參考：http://blog.csdn.net/rlhua/article/details/12683525

資料庫（預設情況下）每60 分鐘從SGA 中自動捕獲一次統計資訊，然後將其以快照形式儲存在AWR 中。這些快照通過一個名為易管理性監視器(MMON) 的後臺程序儲存在磁碟上。預設情況下，快照會保留八天。可以修改快照時間間隔和保留間隔。

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