---
title: "databases"
lang: "en"
author: "Mohammad Abu Mattar"
canonical: https://mkabumattar.com/categories/databases
---

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# Databases

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# Databases

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[![Zero-Downtime PostgreSQL Major-Version Upgrade at Scale](/_astro/hero.C03RcOLI_141vsK.webp)](/case-studies/post/zero-downtime-postgres-upgrade)

## [Zero-Downtime PostgreSQL Major-Version Upgrade at Scale](/case-studies/post/zero-downtime-postgres-upgrade)

-   [DevOps](/case-studies/categories/devops)
-   [Databases](/case-studies/categories/databases)
-   25 Jul 2026
-   08 Mins read

A multi-terabyte PostgreSQL 12 database was reaching end of life, and the business ran around the clock, so the usual answer of "schedule a maintenance window" was off the table. We upgraded it to Pos

[#PostgreSQL](/case-studies/tags/postgresql)[#Logical Replication](/case-studies/tags/logical-replication)[#Zero Downtime](/case-studies/tags/zero-downtime)+3 tags

[Read Case Study](/case-studies/post/zero-downtime-postgres-upgrade)