What is use of Rollback Segments In Database ?

They allow the database to maintain read consistency between multiple transactions.

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Sep 6th, 2004
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Anu

Oct 3rd, 2006

1.Transaction Rollback-When a transaction is rolled back to restore the old image.
2.Transaction recovery-To undo any uncommitted changes when DB is open after instance failure.
3.Read consistency-While transaction is on progress other users in DB do not see any uncommitted changes.