For several years now, the Node.js ecosystem has been steadily shifting towards ES modules (ESM) as the preferred method for sharing and utilizing JavaScript code. While CommonJS has served the community well, ESM are rapidly gaining traction as they offer a standardized approach for creating JavaScript modules across all supported runtimes.

In part one of this series, we managed distributed state using GenServers. This provided a foundation for understanding some core concepts in distributed Phoenix applications. Now, we turn our focus to deployment and scaling strategies. As your application evolves to meet growing demands, knowing how to scale horizontally, maintain high availability, and monitor distributed components becomes crucial.

In this article, you'll learn about N+1 queries, how to detect them with AppSignal, and how to fix them to speed up your Django apps significantly. We'll start with the theoretical aspects and then move on to practical examples. The practical examples will mirror scenarios you might encounter in a production environment. Let's get started!