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 1 hour. Failing since 1 hour. Additional links previous successfully applied patch (outdated): 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 (1 hour ago) | ||||||||||||
| Latest email | 2026-06-02 14:48:46 (24 minutes 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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