This monitor checks the database absolute free space in Megabytes to ensure it is above the defined thresholds. A warning or error alert will be raised if it is below one of the defined thresholds.
Databases that have autogrow set will never generate an alert regardless of the reported free space.
Out of the box, this monitor will never cross a threshold, as soon as both thresholds are set to -1. Monitoring using percentage free space is the default behavior. If it is required to monitor usage of absolute free space, the threshold values for this monitor should be overridden
Unhealthy state is caused by the database running low on free space. This could be due to a rapid growth, or may have been developing slowly over time. Use the following link to view the historic data for this database:
Database Performance Data
This issue may be resolved by either:
Allocating more storage for the database
Setting at least one datafile to autogrow for the database
Alternatively, if database size is not a concern for the database:
Change the thresholds on the monitor for this specific database or all databases
Disable the monitor for this specific database or all databases