// Hacker Noon · 16 February 2026

How OpenAI Scaled to 800 Million Users on PostgreSQL

ChatGPT scaled from zero to hundreds of millions of users while staying on PostgreSQL. Instead of migrating to NoSQL, OpenAI applied seven practical strategies—connection pooling, query optimization, read replicas, caching, sharding, strict connection management, and deep monitoring. The result is a...

Hacker Noon

@hacker-noon · Ajit Singh

hackernoon.com

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