Under the hood, off the hot path: How D1 scales to millions of databases
Cloudflare explains how the D1 control plane scales to millions of serverless SQLite databases.
Cloudflare describes control-plane changes that let D1, its serverless SQLite service, support platforms creating millions of small databases. As of October 8, 2026, live non-deleted databases had grown 15x in one year and 65x in two, while daily active databases grew 18x in a year. Each database maps to a SQLite Durable Object; query traffic stays off a single-region hot path via Workers KV, an Eyeball Worker, and Hyperdrive-backed Postgres replicas. OpenAI's ChatGPT Sites is cited as a production user.
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