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CloudNativePG 1.26 introduces enhanced support for Kubernetes startup probes, giving users finer control over how and when PostgreSQL instances are marked as “started.” This article explores the new capabilities, including both basic and advanced configuration modes, and explains the different probe strategies—such as pg_isready, SQL query, and streaming for replicas. It provides practical guidance for improving the reliability of high-availability Postgres clusters by aligning startup conditions with actual database readiness.

© Laurenz Albe 2025

Everybody wants good performance. When it comes to the execution of SQL statements, accurate optimizer statistics are key. With the upcoming v18 release, PostgreSQL will preserve the optimizer statistics during an upgrade with dump/restore or pg_upgrade (see commit 1fd1bd8710 and following). With the beta testing season for PostgreSQL v18 opened, it is time to get acquainted with the new feature.

© Laurenz Albe 2025

Recently, while investigating a deadlock for a customer, I was again reminded how harmful SELECT FOR UPDATE can be for database concurrency. This is nothing new, but I find that many people don't know about the PostgreSQL row lock modes. So here I'll write up a detailed explanation to let you know when to avoid SELECT FOR UPDATE.

• The Post will be Continuously Updated.

Postgres community bonding

The first phase of GSoC is Community Bonding where mentee gets to know the community of his Organization.

Working with timezones can sometimes lead to confusing results, especially when combining Django's ORM, raw SQL for performance (like in PostgreSQL materialized views), and specific timezone requirements. I recently had an issue while aggregating traffic stop data by year, where all yearly calculations needed to reflect the 'America/New_York' (EST/EDT) timezone, even though our original data contained timestamp with time zone fields.

PostgreSQL Person of the Week Interview with Nisha Moond: Hi! I’m Nisha Moond, based in Bangalore, India - the tech hub. I have over 8+ years of experience in databases. I started my journey tweaking Oracle’s query optimizer and now contribute to the PostgreSQL OSS team at Fujitsu.

PostgreSQL links Blogs, podcasts, newsletters etc. Scaling Postgres 370 - New Scale Out Options (2025-06-15) Postgres Weekly Issue 603 (2025-06-12) Announcements PostgreSQL JDBC 42.7.7 Security update for CVE-2025-49146 (2025-06-13) powa-archivist 5.0.3 is out! (2025-06-11) pg_dumpbinary v2.20 released (2025-06-11) pgtt v4.3 released (2025-06-09) Pgpool-II 4.6.2 released.

BLOBs In PostgreSQL Previous Blog Post

I have already published a blog post about PostgreSQL blobs.

But due to someone posting to get help about another implementation on the PostgreSQL Chat Telegram group about a very unusual method to store blobs, I thought, that should now also be covered.

I did not cover that method, because it is one of the worst ideas to handle blobs inside PostgreSQL.

PG Day France 2025 took place on June 3 and 4 in Mons, Belgium, organized by Leila Bakkali, Matt Cornillon, Stefan Fercot, Flavio Gurgel, Anthony Nowocien, and Julien Riou, with the help of Jean-Paul Argud

Most applications start with a single PostgreSQL database, but over time, the need to scale out, distribute the load, or integrate naturally arises. PostgreSQL's logical replication is one of the features that meets these demands by streaming row-level changes from one PostgreSQL instance to another, all using a publish-subscribe model. Logical replication is more than an advanced feature; it provides a flexible framework you can build on to further distribute and integrate PostgreSQL within your architecture.

One of the things I admire most about PostgreSQL is its ease of getting started.

I have seen many developers and teams pick it up, launch something quickly, and build real value without needing a DBA or complex tooling. That simplicity is part of what makes PostgreSQL so widely adopted.

However, over time, as the application grows and traffic increases, new challenges emerge. Queries slow down, disk usage balloons, or a minor issue leads to unexpected downtime.

PostgreSQL 18 changes this week

Of note:

new GUC log_lock_failure renamed to log_lock_failures commit e5a3c9d9 (" postgres_fdw: Inherit the local transaction's access/deferrable modes. ") was reverted PostgreSQL 18 articles What's New in PostgreSQL 18 - a DBA's Perspective (2025-05-23) - Tianzhou

more...

Regular expressions and PostgreSQL have been a great team for many many years. The same is true for PostgreSQL arrays, which have been around for a long time as well. However, what people rarely do is combine those two technologies into something more powerful that can be used for various purposes.

pgsql_tweaks is a bundle of functions and views for PostgreSQL

The source code is available on GitLab, a mirror is hosted on GitHub.
One could install the whole package, or just copy what is needed from the source code.

The extension is also available on PGXN.

PostgreSQL Person of the Week Interview with Teresa Lopes: I am Teresa Lopes, born in Lisbon, Portugal. While living in Portugal, I always divided my time between Lisbon (house/school/work) and Sertã, Castelo Branco (weekends/holidays). At the end of 2023, I decided to move to Berlin and more recently relocated to Amsterdam (got to love the EU 💙💛).

The Call for Presentations for PostgreSQL Conference Europe that will take place in Riga, Latvia from October 21 to 24 is now open.

Key dates

• Submission deadline: 30 June (at midnight, local time Riga, Latvia; GMT+3)
• Speakers notified: before 1 August
• Conference: 21-24 October

To submit your proposals and for more information see our website. Speakers can submit up to three (3) proposed talks each.

Introduction

In this post, we’ll cover some database design principles and package them up into a catchy mnemonic acronym.

Software engineering is loaded with acronyms like this. For example, SOLID principles describe 5 principles, Single responsibility, Open-closed, Liskov substitution, Interface segregation and Dependency inversion, that promote good object-oriented design.

I recently had a customer that wanted to leverage read replicas to ensure that their read queries were not going to impeded with work being done on the primary instance and also required an SLA of at worst a few seconds. Ultimately they weren’t meeting the SLA and my colleagues and I were asked to look at what was going on.

Chicago is better in summer! Our inaugural event, PG DATA 2026, will kick off 363 days from today, and we want you to be a part of it!

PG DATA’s mission is to encourage the growth of the PostgreSQL community in the Midwest through learning and networking opportunities, to foster collaboration with the developers’ community and academia, and to bring the best global Postgres speakers to our local community.

Logical replication is a versatile feature offered in PostgreSQL. I have discussed the the theoretical background of this feature in detail in my POSETTE talk. At the end of the talk, I emphasize the need for monitoring logical replication setup. If you are using logical replication and have setup monitoring you will be familiar with pg_stat_replication_slots.