See this bug report – VISUALVM-637 Solution: start JVisualVM using below command : jvisualvm.exe -J-Dorg.netbeans.profiler.separateConsole=true I’ve checked this (and it works !) at Windows 10 X64 with java version “1.8.0_102”
Well after I did a little research, it would appear that Peter’s comment was correct. Because the JVM processes were launched by another user (the NETWORK SERVICE account because they were being started by a Windows service) they didn’t show up in jvisualvm. Workaround Since I have access to the application configuration, I have found … Read more
In general: A profiler is running all the time, so it gives you the complete call stack; at any given point in time. A sampler only takes “snapshots” at distinct point in times. Thing is: when you “profile” everything, then that slows down your JVM significantly; and it creates enormous amounts of data within a … Read more
You can use jstat, like : jstat -gc pid Full docs here : http://docs.oracle.com/javase/7/docs/technotes/tools/share/jstat.html
Now I need to connect that application from my local computer, but I don’t know the JMX port number of the remote computer. Where can I find it? Or, must I restart that application with some VM parameters to specify the port number? By default JMX does not publish on a port unless you specify … Read more
One important point is that Mission Control is potentially not free to use on production environments. It is free for applications running in DEV & QA and Oracle are not currently enforcing the charges for production applications (as of Nov 2014). However, their executives have made it clear this may change in time.
I found a very nice diagram which pretty much describes all you need/want to know. New The thread is in new state if you create an instance of Thread class but before the invocation of start() method. Runnable The thread is in runnable state after invocation of start() method, but the thread scheduler has not … Read more
Sampling means taking lots of thread dumps and analyzing stack traces. This is usually faster, does not require runtime changes in your bytecode (which may break it), but is also less accurate. Profiling means instrumenting your classes and methods, so they “report” whenever they are run. This is more accurate, as it counts every invocation … Read more