20. .An RMAN backup job fails, displaying the following error: ORA-19809: limit exceeded for recovery files
Your analysis shows that the Flash Recovery area is full. Which two actions could you take to resolve the error and avoid this error in the future? (Choose two.)
A. take the backup of the flash recovery area less frequently
B. increase the value of the UNDO_RETENTION initialization parameter
C. change the value of the WORKAREA_SIZE_POLICY initialization parameter to AUTO
D. change the backup retention policy to retain the backups for a smaller period of time
E. increase the value of the DB_RECOVERY_FILE_DEST_SIZE initialization parameter
F. increase the value of the CONTROL_FILE_RECORD_KEEP_TIME initialization parameter
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帮顶
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题目翻译如下：
20. 一个RMAN备份的job失败了，显示如下信息: ORA-19809: 超出了恢复文件数的限制
你的分析表明Flash Recovery已满。你将采取下面哪两个操作来解决这个问题，并避免以后再次发生？(选两个.)
A. 降低取走Flash Recory区域的备份数据的频率
B. 增加初始化参数UNDO_RETENTION的大小
C. 将初始化参数WORKAREA_SIZE_POLICY的值改为AUTO
D. 改变备份策略，将备份数据的保留时间缩短
E. 增加初始化参数DB_RECOVERY_FILE_DEST_SIZE的值
F. 增加初始化参数CONTROL_FILE_RECORD_KEEP_TIME的值
C,D
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其中E本来也是解决办法，但它不能满足“avoid this error in the future”这个要求，故不能选。
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