Enter the fully-qualified class name of the class to track and c lick Save.In the Object Instance Tracking section for the tier, click Add.On the Instrumentation page that displays, click the tier you want to customize.On the Object Instance Tracking tab, click Configure Custom Classes to Track.Use the Configure Custom Classes to Track option on the Object Instance Tracking subtab to specify instances of specific classes to track. Note that the classes you configure here are tracked only if their instance count is among the top 1000 instance counts in the JVM. Track Specific Classesįor performance reasons, only the top 20 application classes and the top 20 system (core Java) classes in the heap are tracked automatically.
You can drill down to the tracked classes to see details. Tracked classes now appear in the Object Instance Tracking table. Click the Object Instance Tracking subtab.In the right pane, expand the tier node and open the Node Dashboard for the node on which you want to enable object instance tracking.In the left navigation pane, click Tiers & Nodes.To start an object instance tracking session, follow these steps: Java -classpath %CLASSPATH% -jar myApp.jar When using the JDK runtime environment, set the classpath using the -classpath option for the application. However, it is required for the proper functioning of object instance tracking. Jdk.jcmd is no longer a required module for the custom runtime. Depending on the JDK version, you may also need to specify the classpath as shown below (along with other -jar options).In some cases, you might also need to copy libattach.so (Linux) or attach.dll (Windows) from your JDK to your JRE.
For Java 9 onwards JEP220 moved the capabilities needed by OIT to the Core Java runtime, therefore tools.jar is no longer necessary. You can find tools.jar in /lib/tools.jar. If you are running with the JRE, you must add tools.jar to /lib/ext and restart the JVM. If your application runs with the JDK, tools.jar should be already available. For JVMs prior to Java 9, object instance tracking uses tools.jar.Review Java Supported Environments for information about platform support for object instance tracking.Prerequisites for Object Instance Tracking You need the Configure Memory Monitoring permission to configure the custom classes to track.
You need the Configure Agent Properties permission to set object instance tracking.
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