ocp 052考試詳解:1Z0-V8.02-第45題
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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:
數據庫(默認情況下)每60 分鐘從SGA 中自動捕獲一次統計信息,然后將其以快照形式存儲在AWR 中。這些快照通過一個名為易管理性監視器(MMON) 的后臺進程存儲在磁盤上。默認情況下,快照會保留八天。可以修改快照時間間隔和保留間隔。