OverviewWhen there is no data being shown in Monitor > Virtual Circuits and Monitor > Control, this would likely indicate that the Optimizer is not turned, configured, or licensed.
CauseIn order for the Virtual Circuits and Control graphs to work, the Optimizer must be turned on and configured. It isn't possible for traffic to fall into a Virtual Circuit unless the Optimizer is working. Likewise, the Control only graphs shows the usage of Virtual Circuits and policies.
ResolutionTurn on the Optimizer and allow about 5-10 minutes for data collection. Check the graphs again to confirm the data is being displayed.
f the graphs are still empty and the Optimizer is on and functioning, then the database may not be working properly. Browse to Monitor > Applications or Subnets and confirm if the graph is working. If it is not working, then this could indicate a database error. There are a couple of ways to check the status of the database.
1. Navigate to the Dashboard >System tab and check the Database Status (it should be 'Running')
2. From the command line, enter the following command: show service database (this should also show 'Running')
If the status is 'Stopped' or 'Starting', the database can be restarted from the command line with: service database restart
Allow the database restart about 5 minutes to complete. If the graphs are still empty, please open a support case for further assistance.