You could be more specific about the alert. But one you could receive is that the server is more busy then normal. Above a certain treshold you will be notified about it. Depending on the alert you get is does not have to be something to worry about. Are you running process heavy microflows? When you get such an alert it might be time to check your running microflows. That could give you an indication about what might be causing this and if this is normal or not.