Monitoring Usage with CloudWatch Metrics

Note Amazon EventBridge is the preferred way to manage your events. CloudWatch Events and EventBridge are the same underlying service and API, but EventBridge provides more features. Changes you make in either CloudWatch or EventBridge will appear in each console. For more information, see Amazon EventBridge.

CloudWatch Events sends metrics to Amazon CloudWatch every minute.

CloudWatch Events Metrics

The AWS/Events namespace includes the following metrics.

All of these metrics use Count as the unit, so Sum and SampleCount are the most useful statistics.

Metric	Description
DeadLetterInvocations	Measures the number of times a rule’s target is not invoked in response to an event. This includes invocations that would result in triggering the same rule again, causing an infinite loop. Valid Dimensions: RuleName Units: Count
Invocations	Measures the number of times a target is invoked for a rule in response to an event. This includes successful and failed invocations, but does not include throttled or retried attempts until they fail permanently. It does not include DeadLetterInvocations. Note CloudWatch Events only sends this metric to CloudWatch if it has a non-zero value. Valid Dimensions: RuleName Units: Count
FailedInvocations	Measures the number of invocations that failed permanently. This does not include invocations that are retried, or that succeeded after a retry attempt. It also does not count failed invocations that are counted in DeadLetterInvocations. Valid Dimensions: RuleName Units: Count
TriggeredRules	Measures the number of triggered rules that matched with any event. Valid Dimensions: RuleName Units: Count
MatchedEvents	Measures the number of events that matched with any rule. Valid Dimensions: None Units: Count
ThrottledRules	Measures the number of triggered rules that are being throttled. Valid Dimensions: RuleName Units: Count

Dimensions for CloudWatch Events Metrics

CloudWatch Events metrics have one dimension, which is listed below.

Dimension	Description
RuleName	Filters the available metrics by rule name.