QUESTION :
You queried the V$SYSTEM_EVENT view and noticed that there are waits for the "Log
File Switch Completion" event. What could be the reason for these waits?
A. There is disk I/O contention on the online redo log files.
B. The value set for the FAST_MTTR_TARGET initialization parameter is too high.
1Z0-033
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C. The number of DBWRn processes is not sufficient.
D. The number of ARCn processes is not sufficient.
Answer: A
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A表示有磁盘争用情况，也可能是DBWRn processes 不够吧？
