Help Center/ GaussDB/ Distributed_8.x/ Storage Engine/ Ustore/ Storage Format/ Undo/ Rollback Segment Management

Updated on 2024-06-07 GMT+08:00

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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.

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