Monitoring WebLogic Server 12c - Oracle WebLogic Server 12c Advanced Administration - page 178

Follow these steps to create a new WLDF module and a new WLDF Harvester:
1. Access the Administration Console with your web browser at http://adminhost.
domain.local:7001/console .
2. Click on the Lock & Edit button to start a new edit session.
3. Click on the plus sign to open the Diagnostics tree on the left and then click on
Diagnostic Modules.
4. In the Summary of Diagnostic Modules page, click on the New button.
5. Type QueueLengthModule in the Name field and click on the OK button.
6. Click on the newly created QueueLengthModule module and click on the Targets
tab. Select the All servers in the cluster radio button and click on the Save button.
7. Click on the Configuration tab and then the Collected Metrics tab. Change the
Sampling Period to 60000 and click on the Save Button.
8. Click on the New button in the Collected Metrics in this Module table
to create a new WLDF harvester.
9. Choose ServerRuntime from the MBean Server location drop-down menu and
click on the Next button.
10. Select weblogic.management.runtime.ThreadPoolRuntimeMBean from
the MBean Type drop-down menu and click on the Next button.
11. Select the QueueLength item from the Collected Attributes table on
the left and click the > icon to move it to the Chosen table on the right. Click
on the Finish button.