RMAN备份动态性能视图 V$BACKUP_SET_SUMMARY

该视图中只有一条记录，统计自所有备份集的数据，此视图不常用。

V$BACKUP_SET_SUMMARY provides summary information for a backup set.

Column	Datatype	Description
NUM_BACKUPSETS	NUMBER	Total number of backup sets created
OLDEST_BACKUP_TIME	DATE	Oldest backup start time
NEWEST_BACKUP_TIME	DATE	Newest backup start time
OUTPUT_BYTES	NUMBER	Number of output bytes (not including multiple copies)
ORIGINAL_INPUT_BYTES	NUMBER	Number of input bytes when backup sets were created
ORIGINAL_INPRATE_BYTES	NUMBER	Average input rate
OUTPUT_RATE_BYTES	NUMBER	Average output rate
COMPRESSION_RATIO	NUMBER	The ratio between the total blocks in the datafile and the blocks that RMAN backed up. This is not the the ratio from the AS COMPRESSED BACKUPSET clause of theBACKUP command.
ORIGINAL_INPUT_BYTES_DISPLAY	VARCHAR2(4000)	Displayable format for input bytes
OUTPUT_BYTES_DISPLAY	VARCHAR2(4000)	Displayable format for output bytes
ORIGINAL_INPRATE_BYTES_DISPLAY	VARCHAR2(4000)	Displayable format for input rate
OUTPUT_RATE_BYTES_DISPLAY	VARCHAR2(4000)	Displayable format for output rate