The startup's Postgres survival guide

# Summary This guide from Hatchet's co-founder distills two years of PostgreSQL production experience into practical advice for startups, covering everything from basic schema design and query optimization to advanced topics like the query planner, autovacuum tuning, and large table migrations. The guide assumes SQL familiarity and recommends using raw SQL or tools like sqlc instead of relying solely on ORMs, as optimization at scale often requires breaking past abstraction layers. Key emphasis is placed on thoughtful schema design upfront, since schemas are difficult to change after deployment, and on understanding how Postgres actually executes queries rather than relying on simple heuristics like "add an index when queries are slow."