Fujitsu PostgreSQL blog

Seamless PostgreSQL subscriber upgrades: Preserving Logical Replication state

Vigneshwaran C — Wed, 05 Nov 2025 23:59:45 GMT

Upgrading to a new major version of PostgreSQL has become faster and safer with pg_upgrade, but for teams using logical replication, a persistent pain point remained: the state of their subscribers was lost, forcing a tedious and high-risk rebuild of their replication setups.

Understanding PostgreSQL Write-Ahead Logging (WAL)

Vigneshwaran C — Fri, 09 May 2025 01:05:21 GMT

Earlier this year, I had the incredible opportunity to present at PGConf India, where I delved into the intricacies of Write-Ahead Logging (WAL) in PostgreSQL. My presentation aimed to demystify this crucial database feature that ensures data integrity and enhances performance.

Driving PostgreSQL forward: Fujitsu's key contributions

Vigneshwaran C — Mon, 17 Mar 2025 23:52:03 GMT

Fujitsu has participated in the PostgreSQL community for over 20 years and has contributed to PostgreSQL development by developing new features, as well as creating and reviewing correction patches. And last year we took our team contributions to a whole new level.

A day in the life of a Postgres engineer at Fujitsu - Vigneshwaran C

Vigneshwaran C — Thu, 28 Mar 2024 00:03:54 GMT

Postgres engineers at Fujitsu have been contributing to the community to enhance OSS PostgreSQL features for enterprise adoption, in the areas such as replication and performance. In this blog, I would like to give you a brief look on how I take on my day-to-day activities and what I am passionate about.

Bi-directional replication using origin filtering in PostgreSQL

Vigneshwaran C — Thu, 31 Aug 2023 01:00:14 GMT

In this blog post, I will give a brief introduction to a new PostgreSQL 16 feature that allows bi-directional replication by filtering by origin.

Inside logical replication in PostgreSQL: How it works

Vigneshwaran C — Thu, 16 Mar 2023 00:06:33 GMT

Last month, I was proud to talk about the internals of logical replication to a room full of PostgreSQL enthusiasts at PGConf India 2023. In case you missed it, let's go through it together.

Column lists in logical replication publications - an overview of this useful PostgreSQL feature

Vigneshwaran C — Thu, 22 Sep 2022 01:01:05 GMT

PostgreSQL 15 introduces a new feature that allows specifying column lists in publications, to restrict the amount of data replicated. Let's see what are the advantages of this feature and how to use it.

Logical replication of tables in schema in PostgreSQL 15

Vigneshwaran C — Thu, 10 Feb 2022 00:06:29 GMT

In this post I would like to discuss the new feature added to the upcoming PostgreSQL 15 by the Fujitsu OSS team in collaboration with the PostgreSQL open source community, to enable logical replication of tables in a schema.