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 a
ctions could you take to resolve the error and avoid this error in th
e 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 parame
ter to AUTO
D. change the backup retention policy to retain the backups for a sma
ller period of time
E. increase the value of the DB_RECOVERY_FILE_DEST_SIZE initializatio
n parameter
F. increase the value of the CONTROL_FILE_RECORD_KEEP_TIME initializa
tion parameter
Answer: D, E
闪回恢复区主要是放控制文件备份,数据文件备份。闪回文件。归档文件之类的东西。
如果满了。可以设置 DB_RECOVERY_FILE_DEST_SIZE 来加大。也可以让保留的时间减小。
rman的备份catalog登记信息是记录在控制文件中。由CONTROL_FILE_RECORD_KEEP_TIME参数控制。
放大这个参数会让控制文件保存很久也不retention。
The UNDO_RETENTION parameter is ignored for a fixed size undo
tablespace. The database may overwrite unexpired undo information when
tablespace space becomes low.
workarea_size_policy:该参数定义数据库PGA内存是否自动管理
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