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Here is another annual blog post breaking down code contributions to PostgreSQL itself (not ecosystem projects) by principal author. I have mentioned every year that this methodology has many limitations and fails to capture a lot of important work, and I reiterate that this year as usual. Nonetheless, many people seem to find these statistics helpful, so here they are.

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This post appeared first on the Dalibo blog.

Brest, France, 19 January 2026

We recently encountered a strange optimizer behaviour, reported by one of our customers:

Customer: “Hi Dalibo, we have a query that is very slow on the first execution after a batch process, and then very fast. We initially suspected a caching effect, but then we noticed that the execution plan was different.”

Unless you've built a massive real-time notification system with thousands of distinct channels, it is easy to miss the quadratic performance bottleneck that Postgres used to have in its notification queue. A recent commit fixes that with a spectacular throughput improvement.

We just had the first meetup of 2026, and all I can say is a huge thank you to Ryan Booz and all attendees, both in person and virtual!

I was so happy to see many familiar faces, as well as first-timers. We had great attendance (one of those rare situations when I didn’t order enough pizza :)). Ryan Booz, who, as I previously mentioned, is one of the few out-of-towners who dare to face Chicago winter weather, presented a great talk on configuring Postgres for effective logging and query-optimization analysis.

Anyone who has worked with PostgreSQL in production environments knows that testing database performance is rarely straightforward. Synthetic benchmarks like pgbench are useful for stress testing, but they don't reflect how real applications behave. Production workloads have peaks and troughs, complex query patterns, and user behaviour that varies throughout the day. This is why I'm pleased to introduce the pgEdge Load Generator.

For next month, I'm scheduling 2 or 3 discussions of Amit Langote's talk, Hacking Postgres Executor For Performance, given at PGConf India 2025. If you're interested in joining us, please sign up using this form and I will send you an invite to one of the sessions. Thanks to Amit for agreeing to attend the sessions.Read more »

Building on a strong foundation in 2024, 2025 has been a year of acceleration, scale, and enterprise impact for HexaCluster’s PostgreSQL initiatives.

The Lister Learning and Teaching Centre at the University of Edinburgh. Photo by Paul Zanre - COPYRIGHT: PAUL ZANRE PHOTOGRAPHY.

I'm thrilled to announce that the PostgreSQL Edinburgh meetup is back! 🐘

Earlier this year we started a program (“Developer U”) to help colleagues who show promise for PostgreSQL Development to become contributors. Meet Mark Wong, wearer of many hats.

Google Summer of Code is back for 2026! We’re celebrating the 22nd year of this incredible program that has brought countless talented developers into the open-source world. Please take a moment to review Google’s announcement and familiarize yourself with what makes this year special.

PostgreSQL 19 changes this week logical replication logical decoding enabled dynamically based on logical slot presence and does not require wal_level to be set to logical PostgreSQL 18 articles Instant database clones with PostgreSQL 18 (2025-12-22) - Radim Marek

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© Laurenz Albe 2025

Starting with arrays in PostgreSQL is as simple as declaring a column as integer[], inserting some values, and you are done.

Or building the array on the fly.

Happy New Year! I'm excited to announce release 0.9 of pg_statviz, the minimalist extension and utility pair for time series analysis and visualization of PostgreSQL internal statistics.

This is a significant feature release that expands the scope of analysis to include several new modules and a visualization update:

Why static batch size configuration breaks down in real world networks and how automatic batch size tuning improves snapshot throughput.

Meet the mentee: Anushka Saxena worked with the project maintainers on transforming the documentation for CloudNativePG, as part of the LFX mentorship program.

At first glance, the idea that an idle session could lead to a transaction wraparound might seem counterintuitive. Most PostgreSQL users are familiar with how long-running queries or open transactions can cause table bloat and wraparound risks by pinning the xmin horizon, which prevents autovacuum from reclaiming dead tuples and Transaction IDs.

PostgreSQL 19 changes this week cumulative statistics support for reading/writing auxiliary data from/to disk added pg_createsubscriber support for handling existing publications added pg_sync_replication_slots()  retry logic added PostgreSQL 18 articles PostgreSQL 18 Asynchronous Disk I/O - Deep Dive Into Implementation (2025-12-15) - Josef Machytka / Credativ

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When the database won't start and there's no backup available, most teams assume the game is over. But that's not true—the data is still on disk, it just lost the ability to speak. PostgreSQL data files remain transparent and readable, but here's the problem - without the data dictionary, you cannot understand what those bytes actually mean.

When people first hear "instant recovery," they often assume it is a replacement for backup—or worse, a risky shortcut only experts should attempt. But the truth is exactly the opposite. Instant recovery does not challenge any design boundary of PostgreSQL.