🔗 Phoenix app monitoring: Grafana and PromEx real-time setup

When performance issues arise in your Phoenix applications, monitoring becomes essential. This article by Krzysztof Janiec explores how to implement real-time monitoring using Grafana and the PromEx library, which simplifies the integration of Prometheus metrics into Elixir apps. It covers the key benefits of observability, from tracking request latencies to monitoring background job execution. Janiec provides practical examples, including setting up PromEx plugins and creating custom metrics to suit specific application needs, bringing enhanced visibility into system performance. The combination of Prometheus and Grafana is highlighted as a powerful duo that allows developers to capture and visualize data, ensuring swift troubleshooting and optimized performance across applications. By integrating structured logging with Loki, the article emphasizes the importance of making logs actionable, thus improving debugging capabilities in Phoenix apps.