In the DevTest Portal 10.1 there is database icon that indicates database connectivity - DevTest Portal - DevTest Solutions - 10.1 - CA Technologies Documentation.
This icon was removed from DevTest Portal on release 10.2.
It was causing database connectivity issues with DevTest components.
If you are facing issues DB connectivity issues with Enterprise Dashboard in 10.1, we may have a patch to address your issue, please open a support ticket and reference DE311238, and we will be happy to provide you the patch if it matches your issue.