- AWS CloudWatch monitors AWS resources and applications in real-time.
- CloudWatch can be used to collect and track metrics, which are the variables to be measured for resources and applications.
- CloudWatch alarms can be configured
- to send notifications or
- to automatically make changes to the resources based on defined rules
- In addition to monitoring the built-in metrics that come with AWS, custom metrics can also be monitored
- CloudWatch provides system-wide visibility into resource utilization, application performance, and operational health.
- By default, CloudWatch stores the log data indefinitely, and the retention can be changed for each log group at any time
- CloudWatch Alarm history is stored for only 14 days
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