(Almost) No Downtime MariaDB Upgrades

01.02.2026, 17:00 CET

Abstract

At Automattic we run over 1,500 MariaDB servers that power most of our infrastructure. We recently began upgrading them from MariaDB 10.1 to 11.4 – what could go wrong?

This talk is about what actually went wrong, what we learned, and what to watch out for.

Speaker: Andrija Vučinić – Automattic