A: Use a pool (e.g. Diesel + r2d2) to maintain multiple PostgreSQL connections. Configure max pool size based on expected load and DB resources. In Rocket, request guards can provide pooled connection references to handlers, ensuring reuse. Avoid opening a new connection per request. Also watch out for blocking DB operations — consider running long DB tasks in background threads or using asynchronous wrappers if needed (depending on Rocket’s async support).
