Spotlight on Oracle does not come pre-configured with an alarm for free physical disk space, but Spotlight on Unix (which is bundled with both Spotlight on Oracle and MySQL) does.
To get this alarm working, you can create a separate Spotlight on Unix connection named something like “Linux server”, with connection details the same as the OS connection details in your Spotlight on Oracle connection .
To create a new Spotlight on Unix profile please follow the steps below:
1) Go to File | Connect
2) Select “Spotlight on Unix” from the list on the left
3) Click “Add new connection…”.
When that connection is launched, the component at the bottom right of the Spotlight on Unix home page will show the most full Unix filesystem. An alarm will be triggered if it is more than 95% full (this threshold can be modified by right-clicking on the disk, select “Metrics” then the Thresholds tab). To modify which filesystem is checked, right click that control and select “Disk Options”.
Please note that a separate Spotlight on Unix profile must be created. The Spotlight on Unix profile that is automatically created by Spotlight on Oracle does not raise alarms, because the intent in that scenario is to show only Oracle-related alarms.