（多选题）
You are working on a test database where instance recovery takes a considerable amount of time.How can reduce the recovery time？（）
ABy multiplexing the control files
BBy multiplexing the redo log files
CBy decreasing the size of redo log files
DBy configuring mean time to recover （MTTR） to a lower value
EBy setting the UNDO_RETENTION parameter to a higher value
正确答案
答案解析
略
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