Help Center/ GaussDB/ Feature Guide(Distributed_V2.0-8.x)/ Storage Engine/ Storage Engine Architecture/ Storage Engine Update Description/ GaussDB Kernel 503
Updated on 2025-08-22 GMT+08:00
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GaussDB Kernel 503

- Adapted Ustore to distributed deployment, parallel query, global temporary tables, VACUUM FULL, and column constraints DEFERRABLE and INITIALLY DEFERRED.

- Added the online index rebuild function to Ustore.

- Enhanced B-tree empty page estimation for Ustore to improve the cost estimation accuracy of an optimizer.

- Added the storage engine reliability verification framework Diagnose Page/Page Verify to Ustore.

- Enhanced the view parsing, detection, and repair related to Ustore.

- Enhanced the WAL locating capability for Ustore. The gs_redo_upage system view is added to support constant replay of a single page and obtain and print any historical page, accelerating fault locating for damaged pages.

- Extended the Ustore transaction directory's physical format for transaction slots for space reuse within a transaction.

- Added the online index creation function for Ustore.

- Adapted Ustore to the flashback function and ultimate RTO.