Why GitHub’s MySQL Cluster Crashed: Lessons from Recent Outages

GitHub experienced multiple service outages over recent weeks due to resource contention in its MySQL1 cluster, leading to prolonged downtimes, and the company disclosed detailed timelines, root causes, and ongoing mitigation measures such as load audits, traffic shifting, and infrastructure scaling to prevent future incidents.

GitHubOperationsdatabase outage

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Why GitHub’s MySQL Cluster Crashed: Lessons from Recent Outages

Java Backend Technology

Nov 18, 2018 · Databases

Why Running KEYS * on Redis Can Crash Your System – Lessons from a Real‑World Outage

An incident where a PHP engineer ran a Redis KEYS * command caused a massive lock, CPU spike, and a cascading database crash, prompting a review of Redis safety rules, command restrictions, and best‑practice alternatives like SCAN to prevent future outages.

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Why Running KEYS * on Redis Can Crash Your System – Lessons from a Real‑World Outage