This monitor checks the state of the SQL Database Engine Windows Service.
"Not Running" state of this monitor indicates that SQL DB Engine service is configured to start automatically but in "Stopped" state during the specific time period. This time period is defined in "Unavailable Time" monitor property and could be overridden. By default this value is 900 secs (15 mins). If SQL DB Engine turn back to "Running" state faster than that time it means that it was just reset.
If this monitor is too noisy in specific environment please increate "Unavailable Time". Otherwise if it's too latent, please reduce "Unavailable Time" value.
In general windows service could be stopped by many reasons, including:
The service was stopped by an administrator
The service was prevented from starting because the user account could not be authenticated.
The service encountered an exception that stopped the service.
The service was improperly configured, which prevented it from starting.
You can attempt to restart the service using the following link:
Start SQL DB Engine service
You can view other alerts for this instance of SQL Server™ that may be related to this issue using the following link:
View SQL Server Alerts