单选题

Why can setting too low a value for the FAST_START_MTTR_TARGET parameter reduce your overall database performance?()

AData blocks have to be written more frequently by DBWR. 

BRedo blocks have to be written more frequently by LGWR. 

CYou need to substantially increase the size of your database buffer cache to hold the additional checkpoint records. 

DYou need to substantially increase the size of your redo buffer cache to hold the additional checkpoint records.

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