tcServer insight for a non spring web application

[yadepu]

Hello Gurus / Spring team,
I am working on tcServer insight feature analysis for a non spring, typical struts, JSP based web application.
We have an application is running Tomcat 6. Now I am running the same app on tcServer instance created with insight template.

When I open insight, I can see the initial HTTP requests made all the SQLs got executed with their response time. It is great see the details. Without any specific instrumentation, it is tracking HTTP (Servlets) and Database calls (i.e JDBC Driver)

But my main questions, what are the other features / metrics / tracing, I can see without making much (no) changes to the current application logic.

If I have to instrument my web application, what are first steps to make and what are the features I can take advantage of...

Thanks,
YA