PostgreSQL: Replication LSN Hardening and Clearer Errors
Three commits tighten WAL location parsing to prevent misdirected replication, while related fixes turn misleading internal and file errors into actionable messages. Smaller test and client fixes round out the day.
Duration: PT2M21S
Episode overview
This episode is a short developer briefing from PostgreSQL.
It explains recent repository work in plain language.
- Show: PostgreSQL
- Published: 2026-10-22T13:04:19Z
- Audio duration: PT2M21S
Transcript excerpt
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Hello, it's Thursday, October 22nd, 2026, and this is your PostgreSQL developer briefing.
The lead story is replication safety. Three separate fixes close the same class of bug where loose parsing of write-ahead log locations could silently point replication at the wrong place.
The pattern is consistent. The old scanner code used C format scanning that accepted overlong hexadecimal components, overflowing or truncating values and ignoring trailing characters. That affected start replication commands, timeline history switch points, and the replication receiver's handling of identify system…
A second theme is clearer failures instead of misleading ones. Shared buffer exhaustion when every buffer is pinned no longer reports as an internal server error. Commit 4b97 now reports insufficient resources with separate wording for shared versus local buffers. Copy to from an unlogged table on a standby, in…
Finally, smaller correctness work: new P G stat statements tests to capture how SQL slash JSON queries are jumbled ahead of future fixes, a fix for index progress reporting that used a 32-bit fetch for a 64-bit argument and broke on 32-bit builds, and P SQL polish for drop index…
What's…
Nearby episodes from PostgreSQL
- Weekly Recap - Planner Correctness and Data Safety Fixes
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- Hash Join Performance Fix
- Schema, Search and Notify Correctness Fixes
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- Output Correctness and Volatility Fixes
- Weekly Recap - Planner Fixes and Operational Clarity
- B-Tree Assertion Fix