"In-depth understanding of Java Virtual machines" (v) JVM tuning-Tools

JVM Tuning-tools Jconsole:java monitoring and management console

Jconsole is an opportunity to JMX (Java Management Extensions, Java Management extension) of the JVM monitoring and management tools, monitoring mainly reflected in: stack memory, Thread, CPU, class, VM information, and management is mainly for the JMX MBean (managed beans, managed beans, is a collection of resources, including objects, interfaces, devices, and so on) that can not only view the Bean's properties and method information, but also modify properties or Invoke methods at run time.

Click Jconsole.exe directly in the Jdk/bin directory to start, the interface is as follows:

Start JConsole, select a link

Once connected, you can see the Jconsole overview diagram and the main features: overview, memory, threads, classes, VMS, MBeans

1. Overview

• This does not introduce, that is, I believe everyone can read

2. Memory

• In the memory page we can see the memory status of each part of the JVM during the program running, the lower right corner is the memory usage histogram for each partition, click the corresponding bar to view the details

3. Threads

• This page can see how many threads the current JVM process has started, and can view the status and stack information for each thread, plus a feature to automatically detect deadlocks (note circled)

4. Class

• This page is actually somewhat similar to the thread page, but displays information about the JVM load class

5.VM

• This is not really necessary to elaborate, look at the diagram to understand, shows the current JVM all aspects of information

6.MBeans

Go to: http://www.ymq.io/2017/08/05/jvm-5-tool/#contact

"In-depth understanding of Java Virtual machines" (v) JVM tuning-Tools