Why your Cache won't save you from a "Thundering Herd" 🐂

We've all been there: you add Redis, and your latency drops. But have you planned for the Thundering Herd?

The Problem A Thundering Herd occurs when a massive, synchronized search of processes or user requests hits a backend resource at once.

The Pseudo-Code Risk Most of us write logic like this:

let data = await cache.get(key);

if (!data) {