Mooncake Blog: but, my Postgres (+ lakehouse) is free

Disclaimer: Your Postgres and Lakehouse are free and open too. You don’t need to be (or spend) a giant to use them. Agents need memory. Both working memory and longer-term knowledge. Working memory has to be instant, reliable, and accurate, just like app state.What’s the best place to store it? Postgres. That’s true for both apps and agents. This state is typically tied to an individual user, tenant, or agent. Longer-term knowledge is different. The raw inputs are massive, messy, and shared across users, tenants, and agents—logs, LLM inputs and outputs, interactions. The goal is to ‘get smarter’. What’s the best way to store these raw inputs? A lakehouse. Infinitely scalable, object store-centric, and open to the best tools/engines for processing, analytics, search, MLOps, all available on the same data. And you’re only paying for what you’re using. The classic “data engineering” pipeline was about extracting insights and intelligence from app data to make apps smarter, stickier, and b

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• Megha Jain