
The Shape‑First Tune‑Up Provides Organizations with a Means to Reduce MongoDB Expenses by 79%
TL;DR A fast‑growing SaaS woke up to a silent auto‑scale from M20 → M60, adding 20 % to their cloud bill overnight. In a frantic 48‑hour sprint we: flattened N + 1 waterfalls with $lookup , tamed unbounded cursors with projection, limit() and TTL, split 16 …