Hi, thanks for the great tool to help us profile our back-end components a lot! i have a quick question about the tool: firstly i use the visualVM jmx remote connection and have a heap-dump file in my local.
the interesting thing is the file is about less than 500 MB. but the heap size is about 8GB in Monitor tab. i think the 8 GB could be the real size in our java component. so why the hpprof file is just 400+MB? and i just also can get the instance size in 400+ level, can't reflect the real memory usage in the runtime, right?
Really appreciated if you great team can help on those concerns.
Thanks,
Thank you for your attention. My JDK version is 10.0.1, and eclipse 4.7.3a. I just download the latest version visualvm1.4.2 and visualvm_launcher_u3_eclipse. I have successfully install the integration plugin of visualvm_launcher and checked eclipse preference: Window > Preferences > Run/Debug > Launching > VisualVM Configuration", there's a option "JDK Home", already pointing correctly to my jdk install path. But when I use the visualVM launcher instead of the default launcher of eclipse. It jump out a window: "Error starting VisualVM"and informing "You are running VisualVM using JRE", and inform me to use JDK instead. But I don't know why, I'm actually installed JDK10 and the path is correct. I'm hoping that visualvm work normally in eclipse.
\visualvm142\bin\visualvm.exe --jdkhome D:\JAVA\jdk10.0.1
Ok, we found out that this is caused by your public JRE installation path, which is
D:\JAVA\jdk10.0.1\jre. If you choose any other directory like D:\JAVA\jdk10.0.1\jre10 or D:\JAVA\jre10.0.1 VisualVM will start just fine. The only path, which will not work is D:\JAVA\jdk10.0.1\jre. :-) To fix it - please uninstall public JRE 10.0.1 and install it into different directory or do not install it at all.
Hi All, I'm trying to use VisualVM for a Remote linux host. I connected with the host using "nohup jstatd -p 1099 -J-Djava.security.policy=<(echo 'grant codebase "file:${java.home}/../lib/tools.jar" {permission java.security.AllPermission;};') &" command and unfortunately I can't get the heap dump from the remote machine.
Thank you @thurka, you're absolutely right! I was confused because Profiler tab was missing and Sampler tab contains exactly the same buttons.
Right, Profiler tab is only available for local java applications.
And I already summited a issue in github. oracle/visualvm#157
Hello!
Having problem while trying to run VisualVM on Ubuntu 18.04. Installed from the official repository using Ubuntu Software package manager (some 250MB of downloads). Not able to get past the Licensing Agreement. The "I Agree" and "Exit" buttons at the bottom don't react to clicks. Any ideas?
Having problem while trying to run VisualVM on Ubuntu 18.04. Installed from the official repository using Ubuntu Software package manager (some 250MB of downloads). Not able to get past the Licensing Agreement. The "I Agree" and "Exit" buttons at the bottom don't react to clicks. Any ideas?
I would be willing to help since I am used to work with the NB platform and Maven since several years now.
So to start experimenting I would like to know which is really the official sources repo on GitHub for the sources of VisualVM?
Currently we don't plan to switch from Ant to Maven. Can you please file a RFE (https://github.com/oracle/visualvm/issues/new?template=feature_request.md) and describe your use case?
@jisedlac Thank you for your answer. I'll do what you suggest. 1) IMHO, with Maven it is much easier to compile and build a Netbeans Platform based application. Ant is more flexible but NB projects are more complexe to understand and therefore to build. 2) When people like me want to build their own app/plugin relying on VisualVM artifacts/modules, it is easier as well 3) publish the Maven artifacts to a repo is just super simple and would avoid the step to use Maven Nb plugins to to publish the artifacts of the Ant project.
My question is: would you be interested if I try to port maybe even in parallel the build from Ant to Maven?
By the way, I was able to re-use some modules from VisualVM (the graphs) in my own NB platform app without using the copied-over modules, but by using the original once instead.
I did not look at the 11.1 based code, but do you still need to copy some module sources from NB platform to VisualVm instead of "depending" on them?
Hey folks! Recently upgraded to visvualvm 2.0.1 on OSX. In the past I used to be able to right click an object and copy the objects id down (which I could then feed into an oql query with heap.findObject). I find that in 2.0.1 this functionality is more elusive. Any idea on how to find this?