Oracle Java Mission Control 'LINK'

How to Use Oracle Java Mission Control for Java Application Monitoring and Profiling

Oracle Java Mission Control (JMC) is a powerful tool that enables you to collect and analyze data from Java applications running on any environment, from development to production. JMC can help you diagnose performance issues, memory leaks, latency problems, and more, without introducing significant overhead to your application.

In this article, we will show you how to use JMC to monitor and profile your Java applications using the Java Flight Recorder (JFR) and the JMC user interface. We will also cover some of the features and benefits of JMC, such as automatic analysis, custom triggers, and plug-ins.

What is Oracle Java Mission Control

Oracle Java Mission Control is a set of tools that consists of two main components: the Java Flight Recorder and the JMC user interface.

The Java Flight Recorder is a feature of the Java Virtual Machine (JVM) that allows you to record detailed information about the behavior and performance of your Java application. JFR can capture data such as CPU usage, memory allocation, garbage collection, thread activity, method execution, exceptions, locks, I/O operations, and more. JFR can run continuously in the background or be triggered by specific events or conditions. JFR has minimal impact on the application performance, making it suitable for production environments.

The JMC user interface is a graphical tool that enables you to view and analyze the data collected by JFR. JMC provides various views and charts that help you visualize and understand the application behavior and identify potential issues. JMC also offers automatic analysis capabilities that highlight areas of concern and suggest possible solutions. You can also customize JMC by creating your own triggers, rules, pages, and plug-ins.

How to Use Oracle Java Mission Control

To use Oracle Java Mission Control, you need to have JDK 11 or later installed on your machine. You can download JMC 8 as a compressed archive from Oracle's website. You can also install JMC as a set of plug-ins for Eclipse IDE.

To monitor and profile your Java application using JMC, you need to follow these steps:

Start your Java application with the -XX:+FlightRecorder option to enable JFR. You can also specify additional options to configure the recording settings, such as duration, file name, disk size, etc. For example: java -XX:+FlightRecorder -XX:StartFlightRecording=duration=60s,filename=myapp.jfr -jar myapp.jar

Launch JMC by double-clicking on the jmc.exe file (Windows) or the jmc file (macOS/Linux) in the extracted archive. Alternatively, you can launch Eclipse IDE and open JMC from the Window menu.

In JMC, connect to your Java application by selecting it from the JVM Browser view. You can also connect to a remote JVM by specifying its host name and port number.

Start a recording by right-clicking on the JVM and selecting Start Flight Recording. You can choose from several predefined templates or create your own custom configuration. You can also stop or dump an ongoing recording.

Open a recording by double-clicking on it in the JVM Browser view or by selecting File > Open File... You can also import recordings from other sources.

Analyze the recording using the various views and pages in JMC. You can switch between different perspectives, such as Overview, Memory, Code, Threads, etc. You can also filter, zoom, drill down, export, and compare data.

Use the automatic analysis feature to get a summary of the recording and see if there are any issues or recommendations. You can also create your own rules and triggers to customize the analysis.

Conclusion

Oracle Java Mission Control is a powerful tool that enables you to monitor and profile your Java applications with minimal overhead. JMC can help you diagnose performance issues, memory leaks, latency problems, and more. JMC also offers automatic analysis capabilities that highlight areas of concern and suggest possible solutions. You can also aa16f39245