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Rollback Segment Management
Updated on 2025-08-22 GMT+08:00
Rollback Segment Management
Figure 1 Rollback Segment Management
- In addition to managing some transaction pages (used to store metadata for transaction rollback), each undo zone also manages undo pages.
- Undo rows are stored on undo pages. Therefore, the modified data of historical versions is recorded on the undo pages.
- Records on the undo pages are also data. Therefore, modifications on the undo pages are also recorded on the redo pages.
Parent topic: Undo
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