7.222 V$FLASHBACK_DATABASE_LOG

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 (in bytes) for the current target retention

CON_ID

NUMBER

The ID of the container to which the data pertains. Possible values include:

  • 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs.

  • 1: This value is used for rows containing data that pertain to only the root

  • n: Where n is the applicable container ID for the rows containing data