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You notice that the performance of the database has degraded because of frequent checkpoints. Which two actions resolve the issue（）
A:Disable automatic checkpoint tuning.
B:Check the size of the redo log file size and increase the size if it is small.
C:Set the FAST_START_MTTR_TARGET parameter as per the advice given by the MTTR Advisor. 
D:Decrease the number of redo log members if there are more than one redo log members available in each redo log group.

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出自：Oracle认证

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