On Thu, Jul 4, 2019 at 5:24 PM Amit Kapila <amit.kapil...@gmail.com> wrote: > PFA, the latest version of the undo interface and undo processing patches.
Summary of the changes in the patch set 1. Undo Interface - Rebased over latest undo storage code - Implemented undo page compression (don't store the common fields in all the records instead we get from the first complete record of the page). - As per Robert's comment, UnpackedUndoRecord is divided in two parts, a) All fields which are set by the caller. b) Pointer to structures which are set internally. - Epoch and the Transaction id are unified as full transaction id - Fixed handling of dbid during recovery (TODO in PrepareUndoInsert) Pending: - Move loop in UndoFetchRecord to outside and test performance with keeping pin vs pin+lock across undo records. This will be done after testing performance over the zheap code. - I need to investigate whether Discard checking can be unified in master and HotStandby in UndoFetchRecord function. 2. Undo Processing - Defect fix in multi-log rollback for subtransaction. - Assorted defect fixes. Others - Fixup for undo log code to handle full transaction id in UndoLogSlot for discard and other bug fixes in undo log. - Fixup for Orphan file cleanup to pass dbid in PrepareUndoInsert -- Regards, Dilip Kumar EnterpriseDB: http://www.enterprisedb.com
undo_20190706.tar.gz
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