Java profiling tools can be great for troubleshooting complex issues in Java applications. These tools range in cost and functionality from free Java profilers that ship with the JDK to commercial software like YourKit. The biggest limitation of Java profiling tools, however, is the overhead they create on the application. Java profilers introduce latency and overhead that are unacceptable for any production application.
AppDynamics is a production-ready alternative to free Java profilers like JConsole and VisualVM. With AppDynamics, dev and ops teams can easily find and troubleshoot bottlenecks in the code without impacting the performance of the production environment.
Automatic Application Discovery and Instrumentation
Like Java profiling tools, AppDynamics automatically discovers and maps the application tiers that the monitored JVM interacts with, such as other application servers, web services and databases. In addition, AppDynamics gives you a breakdown of where the latency occurs in the application, allowing you to quickly locate your application bottlenecks.
Lower Overhead than Java Profiling Tools
AppDynamics runs in production with less than 2% overhead on the application, which means you can leave it on all the time without worrying about impacting your end users. Most Java profilers introduce significant overhead into an application, which is unacceptable for a production environment. As a result, many organizations only use Java profiling tools when a crisis is occurring, and have no visibility into the application when it's performing normally.
Business Transaction Monitoring
Unlike free Java profilers, AppDynamics helps you understand your application as your end users experience it: through Business Transactions. No Java profiling tools are able to provide Business Transaction context for bottlenecks, which makes it more difficult to quickly identify and prioritize problems.
With AppDynamics, you can set up alerts on application, Business Transaction and JVM metrics, so you can find and fix problems before they affect your end users. Most free Java profilers don't offer alerting, and the Java profiling tools that do use static, universal thresholds that often cause aler storms.
More About Java Profiling and Free Java Profilers
If you require visibility and monitoring across your entire application instead of a single JVM, you can sign up for a free trial of AppDynamics Pro, is our commerical product for managing application performance. This product goes far and beyond mere Java profiling, allowing you to monitor and manage a large, distributed application all in a single pane-of-glass.
AppDynamics provides Java profiling capabilities for all JVMs and application servers with Java 1.5 and above. This includes full framework and protocol support to give you as much visibility into your application as any free Java profiler.