RFC / proof-of-concept for Umbra, an smgr-layer prototype that decouples logical block identity from physical page placement. For eligible ordinary updates after checkpoint, the prototype preserves the old physical page as the redo baseline and records the old/new physical mapping in WAL, reducing reliance on inline full-page images for those paths. The performance motivation is to reduce checkpoint-boundary WAL volume and recover part of the throughput lost to full-page writes on write-he
| ID | 6832 | ||||||||||||
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| Title | RFC / proof-of-concept for Umbra, an smgr-layer prototype that decouples logical block identity from physical page placement. For eligible ordinary updates after checkpoint, the prototype preserves the old physical page as the redo baseline and records the old/new physical mapping in WAL, reducing reliance on inline full-page images for those paths. The performance motivation is to reduce checkpoint-boundary WAL volume and recover part of the throughput lost to full-page writes on write-he | ||||||||||||
| CI (CFBot) |
Needs rebase!
Needs rebase since 50 minutes. Failing since 50 minutes. Additional links previous successfully applied patch (outdated): 
Summary
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| Stats (from CFBot) | Unknown | ||||||||||||
| Tags | Performance | ||||||||||||
| Created | 2026-06-02 13:18:40 | ||||||||||||
| Last modified | 2026-06-02 13:18:40 (58 minutes ago) | ||||||||||||
| Latest email | 2026-06-02 00:35:57 (13 hours ago) | ||||||||||||
| Status |
PG20-1 (2026-07-01 – 2026-07-31): Needs review
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| Target version | 20 | ||||||||||||
| Authors | Mingwei Jia (nayishan) | ||||||||||||
| Reviewers | Become reviewer | ||||||||||||
| Committer | |||||||||||||
| Links | Git | ||||||||||||
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