Flashback Recovery Area Usage near 100% - what happens next?

Hello,
I am fairly new to Oracle flashback. I have a database which is nearing 100% usage of the flashback area. Until now, I've just been increasing the size to delay the inevitable. I've also gone and pruned archivelogs (using OS commands) from the fra, but this does not seem to have any effect. What I wanted to know is, what will happen if I let it reach 100%. Will the database cease functioning or will it prune files that it no longer needs and free space on its own?
Thanks for any insight you can provide.

geeter wrote:
Thank you.
With respect to "how" I am using flashback, this is something that also confuses me. It seems as if "Flashback Database" has NOT been enabled, but I know that I can flashback a table within my database by enabling row movement on it. I have specified USE_DB_RECOVERY_FILE_DEST as the location to multiplex archivelogs and I use the EM dbconsole to take full backups of the database which seems to also populate a directory "autobackup" even though the backups are directed somewhere else. My guess is that I do NOT have flashback enabled in the sense you meant. I'd appreciate any clarification.To enabling flashback you have to issue ALTER DATABASE FLASHBACK command at mount stage in 10g(can at open stage in 11g) and you can check it from V$DATABASE.FLASHBACK_ON column.If it is 'YES' then that is enabled else is not.In additionally you performed FLASHBACK TABLE feature this is based on undo tablespaces(undo information and related undo settings/parameter) and nothing relationship with FLASHBACK DATABASE.

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