description Application Insights Overview
Application Insights focuses on what happens inside an application when it receives work. With suitable instrumentation, it collects telemetry about requests and dependencies, helping developers connect errors with the operations that produced them. Distributed tracing can follow a request through several services, making it useful when a slowdown is difficult to locate in a microservices application. As an Azure Monitor feature, it provides investigation views for performance and failures alongside endpoint availability testing.
Microsoft documentation. It suits development teams tuning application behavior or investigating faults that a basic uptime check cannot explain. Collection is not universally automatic: supported instrumentation and configuration determine which events and traces are available. Its defining focus is connecting application activity with diagnostic evidence rather than reporting only whether a host is reachable.
help Application Insights FAQ
How do I enable Application Insights for an Azure web app?
You can enable Application Insights directly from the Azure Portal by navigating to your App Service and turning on the Application Insights toggle. Alternatively, developers can install the Application Insights SDK NuGet package in their codebase for more custom telemetry.
What is the difference between Azure Monitor and Application Insights?
Application Insights is a specific feature within the broader Azure Monitor service designed specifically for application-level observability. While Azure Monitor handles infrastructure and network logs, Application Insights focuses on code performance, request rates, and user dependencies.
Does Application Insights support distributed tracing across microservices?
Yes, distributed tracing is one of its strongest features, allowing developers to track a single request as it moves across various microservices and APIs. It automatically generates an Application Map to visually highlight bottlenecks or failed database dependencies.
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