Debug JVM using JVisual VM | Heap Dump | Thread Dump | Profiling | Tech Primers

This video covers how to use JVisual VM to see the heap dump, thread dump and profiling options of the JVM.
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Joakim Karud

[@thebachelorpad1110]

All the videos talk only about what is visual VM and how it provides the information. No one really talks about how to fix memory leaks with some examples. That would have been a really useful video.

[@ok1516]

and how about to find and fix a memory leak?

[@AbdoTawdy]

If i have jre (not jdk) that running my software, jre doesn't come with it this tool, is there a way to use this tool with jre?, The software is prebuild so i am not sure how to configure the jmx ports for it

[@ranjitkumargouda8970]

I think it is there only with JDK, and it is only available if you are using Oracle JDK, not in open JDK.

[@mahee96]

Visual VM has been removed from Java9 and is available as a separate standalone profile

[@NareshKrishnaPayidiparthi]

How to know the memory consumed by spring boot caching ?

[@leelaprasadjagu3177]

Thanks Ajay! very useful

[@kashif3720]

Is it a good idea to expose JMX on production?

[@rahuldeulgaonkar]

thank you

[@bullukumar3226]

Hi, How to extract report for tomcat apache server from this tools. And please explain if I have host any web through tomcat apache and i need to check how much particular web is taking database memory and etc

[@bharadwajkvn1455]

On the remote section in left hand side pane, add the ip address and port number to configure your remote jboss/tomcat/websphere/glassfish/weblogic server details and enable JMX check box, then you are ready to use it.

[@bullukumar3226]

@@bharadwajkvn1455 can i monitor Apache httpd 2.4 If yes How ❓ If no. Any alternative tool

[@true_human_007]

Hi Tech Primers, Can you add advance lessons on memory management like using Jstatd, connecting through JMX, How to analysis heap dump and thread dump what are the memory tuning parameters like -XX:+AggressiveHeap CodeCacheMinimumFreeSpace=2M -XX:ReservedCodeCacheSize=400M JDK utils like - Jstack, Jmap: By using jconsole and it option "Memory Pool Code cache", Thanks in advance

[@romitsutariya225]

very useful

[@rajeshantony74]

so helpful, thanks bro !!

[@kevitvlog]

Very useful. I didn't know it before. Thanks

[@spectacularangular637]

7:00 remote connection is available, need to expose jmx port

[@valix85]

Hi, Good video but can I inspec an instance which run into a jre on remote server? (ubuntu + apache +tomcat +mysql) I have full access on the server..

[@TechPrimers]

+valix85 yes. You can use the remote option to connect to that server and port. In the JVM on the server you have to add jmx ports in the JVM args while starting the jvm

[@valix85]

Tech Primers ok but on server I don't have any JDK, thanks

[@naveenkumar-ok9oc]

Very useful. You can also explain oql console in heap dump. That is very useful. Querying and searching

[@dileepalla6769]

Can u post a example on oauth

[@preethimaccha6273]

Thankq

[@razvanfarte7349]

Thanks

[@kennethcarvalho3684]

you didn't add much value in this video... need to give a solid example of how one solves a problem

[@zenhsuld]

hello.., waiting new tutorial..

[@meghanasurvase7667]

please remove background music, its really disturbing

[@kvnavaneethan1]

Good example for how not to make a tutorial. The uploader has spent good 10 minutes with VisualVM before uploading this "tutorial video" Here's what would help. 1. Create a bottleneck locally in your application. / 2. Keep you application running, connect visual VM and show how to find the bottleneck. ie. What should I look for in a thradDump / cpu / heap profiler when I'm trying to analyze a bottleneck. HTH.

[@jain007neeraj]

_Practice what you preach!_ Go ahead and show him how to do that, create a video upload it and let the world know *HOW TO MAKE A TUTORIAL*

[@vik6330]

Remove music man, it’s irritating please