Amazon CloudWatch Alarms - Introduction to DevOps on AWS

Amazon CloudWatch Alarms

You can set up alarms based on the metrics collected by Amazon CloudWatch Metrics. The alarm can then send a notification to Amazon Simple Notification Service (Amazon SNS) topic or initiate Auto Scaling actions. An alarm requires period (length of the time to evaluate a metric), Evaluation Period (number of the most recent data points), and Datapoints to Alarm (number of data points within the Evaluation Period).