Proactive, continuous monitoring and alerting are essential to managing multiple SQL Server instances. By setting up automated monitoring, you ensure that you are being proactive and not reactive to a potential technical issue or outage before escalation. With targeted monitoring, you can get in front of and resolve a situation before it becomes known to the general user population and management. There are a number of out-of-the-box solutions, as well as established third-party vendors. I will talk about and recommend some in this chapter.