jvisualvm in Unix

Question

We started to check the performance of my application as its getting slow after some time. I am using jvisualvm to observe the cause. Can anyone tell how can i use jvisualvm in Unix as in Windows we can check it through UI. Can we have the same view in Unix also.

Lets my path to jvisualvm is /Prj/tools/java/bin/jvisualvm

When i use help,

Usage: /Prj/tools/java/bin/../lib/visualvm//platform7/lib/nbexec {options} arguments  

General options:  
  --help                show this help  
  --jdkhome <path>      path to Java(TM) 2 SDK, Standard Edition  
  -J<jvm_option>        pass <jvm_option> to JVM  

  --cp:p <classpath>    prepend <classpath> to classpath  
  --cp:a <classpath>    append <classpath> to classpath  
Core options:  
  --laf <LaF classname> use given LookAndFeel class instead of the default  
  --fontsize <size>     set the base font size of the user interface, in points  
  --locale <language[:country[:variant]]> use specified locale  
  --userdir <path>      use specified directory to store user settings  

Module reload options:  
  --reload /path/to/module.jar  Installs or reinstalls a module JAR file.

Tamandua

just use that binary? – Wearproof

possible duplicate of VisualVM over Putty SSH-tunnel – Rime

did u find how to run it ? – Logography

Answer 1

1. Use Mobaxterm tool to connect to Linux box.
2. set display variable as: setenv DISPLAY :0.0
3. go to /bin
4. Launch as: ./jvisualvm

I hope this works

Correspond

Answer 2

Just type in your terminal:

/Prj/tools/java/bin/jvisualvm

And hit enter. If you want to pass some arguments or options (like JDK home) put it after "jvisualvm" in the command above using the format provided by help.

Wearproof

I am already in JDK bin directory and if If use command like : [server-name bin]$/Prj/tools/java/bin/jvisualvm &enter. It stops for 3-4 sec then nothing happens. prompt comes to next line – Tamandua

do you have JAVA_HOME set up? what does "echo $JAVA_HOME" print? – Wearproof

Earlier It was not set, Now I set and after echo $JAVA_HOME it prints /Prj/tools/java . But still same internal error. – Tamandua

@Champ23 wait, are you doing it remotely? if so then how are you connecting to the server? – Wearproof

Yes, Remotely. I am trying to access server through putty. – Tamandua

@Champ23 and are you running it with X Forwarding? – Wearproof

We connect through VPN and then Using remote desktop we do task.About X forwarding i don't know as the setup is given by client – Tamandua

@Champ23 remote desktop? so you can use other GUI applications there? it's not only a bare terminal (command line)? I though (still think) it's something with how X server is configured at the Unix machine – Wearproof

Yes X forwarding, as in error i can see it on Linux. Yes through VPN we have access on remote desktop to access UI of application and Linux server through puyty. – Tamandua

Answer 3

You can setup the remote connectivity to the unix box from the jvisualvm.

Else, you can set the DISPLAY parameter of the unix to your desktop IP [like DISPLAY=<your IP>:0.0;export DISPLAY] Note: Use the unix command according to your SHELL

Maniac

I did try but getting below exception: java.lang.InternalError: Can't connect to X11 window server using 'xxx.xxx.xx.xx:0.0' as the value of the DISPLAY variable. – Tamandua

Probably the firewall issue... I am not aware how to fix the firewall – Maniac

Answer 4

Goto the JDK bin folder and run the jvisualvm binary by typing jvisualvm and pressing enter.

Rime

yes I am using : [server-name bin]$/Prj/tools/java/bin/jvisualvm &enter. It stops for 3-4 sec then nothing happens. prompt comes to next line. – Tamandua