By default, APM Insight agent monitors known frameworks and libraries in your application code. However, there may be certain methods which may not be instrumented by the agent. Such kind of code are classified as ' un-instrumented block of code'.
If you prefer to monitor these blocks of code, you can instrument them using custom instrumentation. Custom instrumentation allows you to monitor specific blocks of your application code.
Related articles:
- Custom instrumentation for Java applications
- Custom instrumentation for .NET applications