You can get started with Amazon CloudWatch for free. Many applications should be able to operatewithin these free tier limits. New and existing customers also receive 3 dashboards of up to 50 metrics each per month at noadditional charge Basic Monitoring metrics (at five-minute frequency) for Amazon EC2 instances arefree of charge, as are all metrics for Amazon EBS volumes, Elastic Load Balancers, and Amazon RDSDB instances. https://aws.amazon.com/cloudwatch/pricing/