Methods, computer readable media, and apparatuses for dynamically scalable real-time system monitoring are presented. For example, according to one aspect, multiple performance metrics are received from multiple performance metric collection agents. At least some of the performance metrics are identified based on an association with a common entity. The identified performance metrics are utilized to evaluate whether performance conditions specified by rules associated with the common entity have been satisfied. Responsive to evaluating that a performance condition has been satisfied, an alert is generated and communicated to one or more subscriber devices associated with the common entity.