What Really Happens Inside Your Database When an AI Agent Starts Querying | by Vishesh Rawal | May, 2026

A deep dive on what breaks inside PostgreSQL when you connect an AI agent to it - connection pools, query planner, locks, the works. TL;DR: A traditional app holds a DB connection for ~5ms. An AI agent holds it for ~6,000ms because the connection stays open while the LLM thinks. That's a 1,200x reduction in effective throughput from the same pool. The article traces a single agent-generated query through every layer of the database - connection pool, query planner, schema inference, lock manager - and shows where each assumption breaks.