PlanetScale utilizes 768 servers to efficiently manage infrastructure for applications with millions of customers and high query volumes. Database sharding is employed to distribute queries and data across multiple servers, addressing the scaling challenges of traditional single database servers.

PostgreSQL has been a key data system for ChatGPT and OpenAI's API, supporting a user base that has grown to 800 million. The database load has increased by over 10 times in the past year, necessitating advancements in production infrastructure to meet rising demands.