![]() ![]() To enable that you need to go Template manager and click and enable object statistics and save as own one. I prefer to make a snapshot with objects stats, which you can enable easier: In the section I/O, on the tab Socket Overview you can easily understand what kind remote host slow, because information like this very helpful In the section threads, you can find the biggest thread, expand call tree and review hot methods as well. In the section code, you can easier find hot packages and hot classes. On Overview panel you will see that panel with CPU usage and Heap usage overview: You can download dump to the local machine and open through JMC (Java mission control) from JDK package. Stop a recording with a specific identification number (by default, recording 1 is stopped).ĭump the data collected so far by the recording with a specific identification number (by default, data from recording 1 is dumped). usr/java/latest/bin/jcmd 19088 JFR.start delay=10s duration=5m filename=/tmp/recording-without-stats.jfrĬheck the status of all recordings running for the specified process, including the recording identification number, file name, duration, and so on. Well, after that you can start to making a snapshot using jcmd util on the server side. You cannot use them without a contract with Oracle in a commercial, production environment.Īs additionally, I like to enable that option on test env. JMC and JFR are not exactly free software. įirst of all, you need to restart your app (Jira, Confluence, Bitbucket or Bamboo) with next flag for enabling that feature: -XX:+UnlockCommercialFeatures -XX:+FlightRecorder ![]() How to use the Java Flight Recorder and make a snapshot. Today I want to describe small built-in tool JFR (Java Flight Recorder). ![]()
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