OpenTelemetry provides a single set of APIs, libraries, agents, and instrumentation to capture distributed traces and metrics from your application. In a Next.js application, OpenTelemetry can be used to collect and export telemetry data (traces, metrics, etc.) to help you understand the performance and behavior of your app.
instrumentation.tsJaeger is a distributed tracing system that helps you monitor and troubleshoot complex, microservices-based architectures. In the context of a Next.js application, Jaeger can provide detailed insight into the request lifecycle within your application, allowing you to trace the path of requests and pinpoint bottlenecks.
Prometheus is an open-source systems monitoring and alerting toolkit, focused on handling time-series data like metrics. For a Next.js application, Prometheus can be used to collect and store performance metrics, such as load times or server response times, enabling you to track performance trends and set up alerts for any significant changes.