---
author: "Umesh Malik"
canonical: "https://umesh-malik.com/blog/tag/database-reliability"
description: "Explore articles tagged with Database Reliability by Umesh Malik — AI Engineer, LLM & GenAI Developer. Learn Database Reliability best practices, practical tips, and in-depth guides."
title: "Umesh Malik's Blog - Database Reliability Articles | Database Reliability Tutorials"
tokens: 175
generator: "scripts/generate-page-markdown.mjs"
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# Database Reliability

1 article

 [![Dashboard-style cover for Hyperdrive MySQL on Cloudflare Workers showing a Worker, client node, shared cache and endpoint node, with a 0.001 percent bug rate and 99.99 percent success target](https://umesh-malik.com/blog/hyperdrive-mysql-workers-pooler-bugs-cover.png)

Web Engineering • Oct 15, 2026

### Hyperdrive MySQL on Workers: 3 Pooler Bugs and How to Test Them

Hyperdrive MySQL on Workers is GA. Three pooler bugs it hit, from lost emoji to a 0.001% empty-result cache fault, and the test that catches each.

7 min read

Read more →](https://umesh-malik.com/blog/hyperdrive-mysql-workers-pooler-bugs)