Hi,
Flashback logs will be retained for restore points. (when you drop the restore point, those related flb files will be deleted) -> See :
https://ermanarslan.blogspot.com/2017/08/rdbms-flashback-feature-demo-guranteed.htmlSo, check this in the first place.
You don't delete FLB files manually..Keep that in mind too..
In addition to that, the flashback logs will be deleted when necessary.. (for instance when archiver needs space).. so in this case, there is no alarm situation.
However; there is an important thing to check.. Theere is a hard coded limit;
_MINIMUM_DB_FLASHBACK_RETENTION value. The default is 1 hour.
So if you have an archive/redo storm, you may end up with some throubles, when you rely on this auto deletion..
See Mos NOTE -> FRA: Flashback logs are not being deleted when space is needed for archive logs (Doc ID 1481739.1) for details and available workaround.