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Oracle® Database Reference
11g Release 1 (11.1)

Part Number B28320-01
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V$FLASHBACK_DATABASE_LOG displays information about the flashback data. Use this view to help estimate the amount of flashback space required for the current workload.

Column Datatype Description
OLDEST_FLASHBACK_SCN NUMBER Lowest system change number (SCN) in the flashback data, for any incarnation
OLDEST_FLASHBACK_TIME DATE Time of the lowest SCN in the flashback data, for any incarnation
RETENTION_TARGET NUMBER Target retention time (in minutes)
FLASHBACK_SIZE NUMBER Current size (in bytes) of the flashback data
ESTIMATED_FLASHBACK_SIZE NUMBER Estimated size of flashback data needed for the current target retention