A variety of free troubleshooting and debugging tools exist but which
ones are really useful when analyzing issues with WebLogic Server? In
this new blog post series, I will talk about some of the best tools that
are available, easy to use, free, and very effective in identifying a
bunch of issues. In this first post I will cover VisualVM.
most recent version, or 1.3.5, was released on 11/13/2012. This tool
consists of an user-friendly visual interface for monitoring running
JVMs. Multiple instances of WLS or Java can be monitored at the same
time by just connecting to running local or remote JVMs. VisualVM needs
to run on Oracle Sun JDK 6+, the JDK, not the JRE. VisualVM can be
started as follow to specify the JDK to run it it on.
visualvm --jdkhome "JDK_location", or visualvm --jdkhome "d:\jdk160_24"
/etc/visualvm.conf can be modified to specify a desired JDK. After
launch, the list of local running Java instances will be displayed on
the left panel under applications. In Remote, you can define the host of
other running Java instances. By selecting a running server and
clicking on open, you should get a screen similar to the following: Read the full article here
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