This article helps you to understand what to monitor if you have a Node.js application in production, and how to use Prometheus - an open-source solution, which provides powerful data compressions and fast data querying for time series data - for Node.js monitoring.
What is Node.js Monitoring?
The term "service monitoring", means tasks of collecting, processing, aggregating, and displaying real-time quantitative data about a system.
Monitoring gives us the ability to observe our system's state and address issues before they impact our business. Monitoring can also help to optimize our users' experience.
... read the whole story at blog.risingstack.com.