It’s not uncommon for web apps to be very client-side heavy. Java Performance Monitoring With Real User Monitoring (RUM) Note: Some providers, including Stackify Retrace, provide free trials that can be used to help identify immediate problems. Some tools lack support for async queries or are not tuned properly and slow down your application. Typically expensive to run on all QA/Staging and Production servers. Aggregate summaries to see highly used requests to help focus development time. Debug production live by analyzing traces and exceptions. The key to perfecting Java performance monitoring is to identify issues before going into production by monitoring QA/Staging. The ability to monitor your most critical environment: Production. This gives you method level visibility to your code that is running in production. This is done by aggregating timing statistics and sampling traces. The trick with these profilers is to provide the right information in a smart way so as not to impact production performance. Java Performance Monitoring With an APMĪpplication performance management (APM) tools take on the task of tracking all requests on a production system. QA and Production environments will require an APM solution. Consĭesigned for the development cycle only. By helping you follow the flow of a request, you can see what types of method calls are responsible for your response time. These tools give order to the vast amount of data available in a JVM profiler. Tools like Prefix can provide very detailed traces of what your code is doing: Screenshot of Prefix web request trace Pros XRebel is set up using a Java Agent on your web application’s container and provides an overlay on your application that gives details about the current request. Prefix provides deep level performance details about your app, including ORM calls with generated SQL, SOAP/REST API calls, and trace details from the most commonly used third-party libraries and frameworks. These tools are focused on the performance of individual web requests or transactions. Standard java profiling tools are focused on the performance of all methods across the entire application. Tracing Java Web Requests and Transactions VisualVM, JProfiler, YourKit and Java Mission Control. (Note: some profilers can work off thread and memory dumps in a limited fashion.) Popular Tools Requires a direct connection to the monitored JVM this ends up limiting usage to development environments in most cases. Great for tracking down memory leaks the ability to manually run garbage collection and then review memory consumption can easily shine a spotlight on classes and processes that are holding on to memory in error. Screenshot of VisualVM CPU and Heap Size Pros This allows you to spec out memory and CPU requirements for production. JVM Profiles offer a ton of raw data by tracking all method calls, allowing you to find CPU and memory consumption hotspots.Ī good scaling test is to set up an Apache JMeter job to hit an endpoint you are developing a few thousand times while linked to a profiler.
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