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：
参考：http://blog.csdn.net/rlhua/article/details/12683525
数据库（默认情况下）每60 分钟从SGA 中自动捕获一次统计信息，然后将其以快照形式存储在AWR 中。这些快照通过一个名为易管理性监视器(MMON) 的后台进程存储在磁盘上。默认情况下，快照会保留八天。可以修改快照时间间隔和保留间隔。