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JVM performance monitor

 
Ranch Hand
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JDK 11, Windows 10

HOw to check JVM performance ? There is some kind of interface or utility that comes with JDK. Someone showed me , but I forgot.
Do I need separate app for that OR can I just use available built in utility / interface ?

Thanks
 
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Moving to our performance forum.

Maybe you mean JConsole:

My Java bin folder wrote: bin]$ ls
jaotc      javadoc   jdeprscan  jinfo  jps         jstatd   rmiregistry
jar        javap     jdeps      jjs    jrunscript  keytool  serialver
jarsigner  jcmd      jfr        jlink  jshell      pack200  unpack200
java       jconsole  jhsdb      jmap   jstack      rmic
javac      jdb       jimage     jmod   jstat       rmid

 
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JConsole is very bare bones. VisualVM is much better, IMO, even though it does not ship with the JVM.

These days, OpenJDK also has Java Flight Recorder.
 
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Here is quite fine summary of JVM monitoring tools. I myself used basically only VisualVM so far, I found it not very easy to use for some deeper heap analysis, but for overall view its fine.
 
Consider Paul's rocket mass heater.
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