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...Monitoring Flashback Database
V$FLASHBACK_DATABASE_STAT can be used to
- See bytes written during last flashback interval
Notes:
The V$FLASHBACK_DATABASE_STAT view can be used to see how many bytes of flashback data (database and redo too) were written during the last “interval”. The length of an interval is undocumented (or at least I could not find it).
It also can be helpful in determining space requirements for the flashback logs.