Monitoring WebLogic Server 12c - Oracle WebLogic Server 12c Advanced Administration - page 166

11. Select the QueueLength option from the Message Attribute drop-down menu and
select the > option from the Operator drop-down menu and type 100 in the Value
field. Click on the Finish button.
12. On the following screen, click on the Finish button again.
13. Click on the EmailAlertWatch to assign the notification. Click the Notifications tab.
14. Select EmailAlertNotification from the Available table to the left and click on the >
icon to move it to the Chosen table to the right. Click on the Save button.
15. Click on the Activate Changes button to finish.
How it works...
WLDF is a very powerful framework and helps WebLogic Administrators to properly monitor
a WebLogic domain.
The diagnostic module was created with a WLDF Harvester for the QueueLength attribute
of the ThreadPoolRuntimeBean MBean and a sampling period of 60000 . The sampling
period is the interval between metric-collection cycles, in milliseconds. The data collected by
the harvester is stored in a WLDF archive.
The default archive is stored in a file-based format at $DOMAIN_HOME/
servers/<serverName>/data/store/diagnostics .