PGNexus Daily News PostgreSQL Technical Articles [image: What's New in Tiger Cloud: Bigger Performance Gains, Wider Platform Reach, Better Visibility] <https://pgnexus.ai/tech-blogs?url=https%3A%2F%2Fwww.tigerdata.com%2Fblog%2Fw...> Nicole Ghalwash What's New in Tiger Cloud: Bigger Performance Gains, Wider Platform Reach, Better Visibility <https://pgnexus.ai/tech-blogs?url=https%3A%2F%2Fwww.tigerdata.com%2Fblog%2Fw...> Tiger Cloud has shipped several updates to its managed PostgreSQL-based platform. TimescaleDB v2.26 and v2.27 deliver significant performance improvements: aggregate queries on co… Read the Blog <https://pgnexus.ai/tech-blogs?url=https%3A%2F%2Fwww.tigerdata.com%2Fblog%2Fw...> PostgreSQL Hackers Email Discussion Highlights index prefetching <https://pgnexus.ai/hacker-discussions?subject=index%20prefetching> Peter Geoghegan posted V31 of the index prefetching patch set, noting it addresses bit rot against the current master branch with only minor differences from the previous version.… Read Discussion <https://pgnexus.ai/hacker-discussions?subject=index%20prefetching> walsummarizer can get stuck when switching timelines <https://pgnexus.ai/hacker-discussions?subject=walsummarizer%20can%20get%20st...> The discussion concerns a bug where the WAL summarizer gets stuck during timeline switches. Thom Brown raised a clarifying question about whether the summarizer needs a CHECKPOINT… Read Discussion <https://pgnexus.ai/hacker-discussions?subject=walsummarizer%20can%20get%20st...> Fix GROUP BY ALL handling of ORDER BY operator semantics <https://pgnexus.ai/hacker-discussions?subject=Fix%20GROUP%20BY%20ALL%20handl...> A previously discussed revert of the "GROUP BY ALL handling of ORDER BY operator semantics" fix has been pushed by Tom Lane after no objections were raised during a waiting period… Read Discussion <https://pgnexus.ai/hacker-discussions?subject=Fix%20GROUP%20BY%20ALL%20handl...> Why clearing the VM doesn't require registering vm buffer in wal record <https://pgnexus.ai/hacker-discussions?subject=Why%20clearing%20the%20VM%20doesn't%20require%20registering%20vm%20buffer%20in%20wal%20record> The thread concerns a change to `visibilitymap_clear()` that converted a runtime `elog(ERROR)` check into an `Assert()`. Fujii Masao raised concern that in non-assert builds, a wr… Read Discussion <https://pgnexus.ai/hacker-discussions?subject=Why%20clearing%20the%20VM%20doesn't%20require%20registering%20vm%20buffer%20in%20wal%20record> doc: clarify wal_sender_shutdown_timeout behavior for small values <https://pgnexus.ai/hacker-discussions?subject=doc%3A%20clarify%20wal_sender_...> Chao Li submitted a documentation patch to clarify the behavior of `wal_sender_shutdown_timeout` for special values, noting that 0 causes immediate WAL sender termination via `Wal… Read Discussion <https://pgnexus.ai/hacker-discussions?subject=doc%3A%20clarify%20wal_sender_...> Restructured Shared Buffer Hash Table <https://pgnexus.ai/hacker-discussions?subject=Restructured%20Shared%20Buffer...> Dhruv Aron (Databricks) proposes replacing PostgreSQL's dynahash-based shared buffer lookup table with a specialized hash table offering simpler structure, lower memory overhead,… Read Discussion <https://pgnexus.ai/hacker-discussions?subject=Restructured%20Shared%20Buffer...> Click here for the full Hacker discussion highlights <https://pgnexus.ai/daily-updates?file=2026-07-17-postgresql-daily-news-210.m...> Industry News [image: Amazon fixing bug that billed some AWS customers billions of dollars] <https://pgnexus.ai/tech-news?url=https%3A%2F%2Ftechcrunch.com%2F2026%2F07%2F...> techcrunch.com Amazon fixing bug that billed some AWS customers billions of dollars <https://pgnexus.ai/tech-news?url=https%3A%2F%2Ftechcrunch.com%2F2026%2F07%2F...> Amazon is working to fix a billing bug that caused some AWS customers to see wildly inflated charges — in some cases showing estimated bills in the billions of dollars. The errone… [image: Nuclear startup Valar Atomics in talks to raise new funding at $6B valuation] <https://pgnexus.ai/tech-news?url=https%3A%2F%2Ftechcrunch.com%2F2026%2F07%2F...> techcrunch.com Nuclear startup Valar Atomics in talks to raise new funding at $6B valuation <https://pgnexus.ai/tech-news?url=https%3A%2F%2Ftechcrunch.com%2F2026%2F07%2F...> Nuclear energy startup Valar Atomics is reportedly in talks to raise a new funding round at a $6 billion valuation. The potential deal is notable not only for its scale but also b… Social Media Updates [image: The pgEdge AI Knowledgebase Builder now ships per-model database packages instead of a single monolithic DB.] <https://pgnexus.ai/social-media?url=https%3A%2F%2Fwww.linkedin.com%2Fposts%2...> linkedin The pgEdge AI Knowledgebase Builder now ships per-model database packages instead of a single monolithic DB. <https://pgnexus.ai/social-media?url=https%3A%2F%2Fwww.linkedin.com%2Fposts%2...> pgEdge AI Knowledgebase Builder has replaced its single monolithic SQLite database with separate per-model packages. Previously, pre-computed embeddings for all supported models w… [image: In PostgreSQL, every write starts in the WAL before it's flushed to disk.] <https://pgnexus.ai/social-media?url=https%3A%2F%2Fwww.linkedin.com%2Fposts%2...> linkedin In PostgreSQL, every write starts in the WAL before it's flushed to disk. <https://pgnexus.ai/social-media?url=https%3A%2F%2Fwww.linkedin.com%2Fposts%2...> In PostgreSQL, all writes go through the WAL before being flushed to disk, with CHECKPOINT forcing that flush to bring the database to a consistent state. Prior to PostgreSQL 19,… linkedin Backups belong to everyone. <https://pgnexus.ai/social-media?url=https%3A%2F%2Fwww.linkedin.com%2Fposts%2...> pg_hardstorage is an open-source backup solution for PostgreSQL, released under the Apache 2.0 license. The project is fully open source, both in its licensing and in how it is bu… Want to stay up to date with the PostgreSQL community and industry news? Visit PGNexus <https://pgnexus.ai> to learn more