AWS CloudWatch is a vital instrumentation service for all resources of AWS. By design, it has two core components
- Metric
- Alarm
In AWS Metric model, a dimension is metrics metadata in the form of a name/value pair. Metrics can have up to ten dimensions. When you set dimensions, AWS services send both data and metadata to CloudWatch. Dimensions can be useful for filtering data and aggregating statistics.
CloudWatch Alarms feature allows you to watch CloudWatch metrics and to receive notifications when the metrics fall outside of the levels (high or low thresholds) that you configure. You can attach multiple Alarms to each metric and each one can have multiple actions.
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