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Choose your I/O execution engine with `io_method` and size the worker pool with `io_workers`—and yes, you can resize workers without restarting.

Please note different time and location this month at UpStart Collective at the U.S. Bancorp Tower (a.k.a. Big Pink). Please RSVP on MeetUp. Tuesday September 8, 2026 from 6:30pm to 8:30pm.

Coinciding with devopsdays Portland, OR, Sept 8-10, 2026.

In Part 6 of this special Postgres in Production deep dive series, Ryan Booz asks a question that determines how useful pg_stat_statements can be for you at all: do you have a high cardinality workload?

In Part 6 of this special Postgres in Production deep dive series, Ryan Booz asks a question that determines how useful pg_stat_statements can be for you at all: do you have a high cardinality workload?

Introduction

The purpose of this blog post is to introduce pg_walviz, a new tool to visualize PostgreSQL WAL segment files.

pg_waldump is very useful to display a human-readable rendering of the WAL. However, sometimes we also want to see how records are physically stored in a segment: the WAL pages, record fragments, continuation records, alignment padding, block references, full-page images and raw bytes.

PostgreSQL 18's new io_max_concurrency caps per-process I/O operations in flight.

My previous article talked about the checkpoint happiness hint: You probably should not change the checkpoint_timeout setting from its default of 5 minutes.

Checkpoint Followup Questions

A good follow-up question was raised: can an HA replica can save you from downtime if you want to set a large checkpoint_timeout?

There is no shortage of PostgreSQL operators for Kubernetes. Projects such as CloudNativePG, the Zalando postgres-operator, Crunchy PGO, and StackGres have all helped shape the ecosystem.

So why did we build another one?

Our answer is simple: multi-site PostgreSQL along with other capabilities.

PostgreSQL 17 introduced read streams that combine adjacent disk blocks into larger I/O requests.

#​661 — August 12, 2026

Web Version

🏖️ We're taking a summer break next week, so the next issue will be on August 26.
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Your editor, Peter Cooper

Postgres Weekly

Formatting SQL tends to bring some of the same questions again and again: should we uppercase clause keywords? should we put the separating comma at the start of a line to ease refactoring? how to align the SQL clauses with one-another?

Over the years I have grown my own SQL style and didn’t find tooling that would implement it. Also, I’ve been asked here and there if there is a tool that would replicate The Art of PostgreSQL SQL indentation style… and now there is finally a good answer to that question!

Implement multi-tenant BYOK column encryption in PostgreSQL with pgcrypto using customer-managed encryption keys.

You have probably read a dozen tutorials on setting up PostgreSQL High Availability (HA). On paper, it looks simple: spin up a primary instance, spin up a standby, and let them replicate.

IntervalStyle changes how PostgreSQL parses interval input, not just formats output—and in one case, it silently flips the sign of your data.

Moving a database from MySQL to PostgreSQL is two jobs, not one. Migration tools move the schema and the data. What they don't touch is the long tail behind the database: every query your application, reports, and cron jobs wrote in MySQL's dialect still has to be rewritten for PostgreSQL — one by one. That rewriting is SQL query translation, and it is where migrations quietly lose their weeks.

From October 20-23, the global Postgres community will descend upon the beautiful Palacio de Congresos in Valencia, Spain, for PGConf EU. I compiled an overview of the sessions and community events EDB colleagues are running.

Partitioning gets sold as a performance switch. You flip it on a big table, and the slow queries get fast. Most of the time, that is exactly what happens. But there is a version of this where you do all the work, split a huge table into clean partitions, and the slow queries stay exactly as slow as they were. The table is partitioned. Nothing got better.

Every PostgreSQL connection since 8.0 has heard the server announce `integer_datetimes`—a parameter that's had only one possible value since PostgreSQL 10.

The PostGIS Team is pleased to release PostGIS 3.7.0beta2! Best Served with PostgreSQL 19 Beta2 and GEOS 3.15.0beta2.

This version requires PostgreSQL 14 - 19beta2, GEOS 3.10 or higher, and Proj 6.1+. To take advantage of all features, GEOS 3.15+ is needed. To take advantage of all SFCGAL features SFCGAL 2.3.0+ is needed.

Enterprise AI doesn’t fail because strategy was wrong. Or because the platform wasn’t ready. Or because the execution layer broke.

It fails because organizations treat those as three different conversations — run by three different teams, on three different timelines — instead of what they actually are: three altitudes of the same question.