Oracle Admins, if my undo fills up, will it roll back updates and inserts? I've got a 170Gig database, I increased my SGA and now my undo has grown 20 gigs in a week. I don't want to turn on auto extend. if this data warehouse tablespace fills up during my nightly cycle will it rollback my updates/inserts and kill this job? I looked at my undo and its 80% flashback data, 3 days worth of flashback, and yet my flashback is set to only 7 hours. Any ideas, thank you, Patrick.