The Databases - Data File Group About to Grow alarm is raised when a file in the disk group is about to grow. You can use this information to ensure the time the file resizes is suitable; for example at a time of off-peak activity.
The Databases - Dynamic Data File Group Growths Remaining and Databases - Data File Group Space Used alarms are raised when the space allocated to a disk group is about to run out.
This Databases - Data File Group About to Grow alarm is raised before a file is about to grow so you can ensure the time the file resizes is suitable; for example at a time of off-peak activity. It is based on a ratio between FixedDataUsed and TotalDB calculated on the FileGroup procedure.
Note: This alarm is disabled by default. Use the Spotlight Client to Configure | Alarms to enable the alarm.