Monitoring Amazon EventBridge

EventBridge sends metrics to Amazon CloudWatch every minute for everything from the number of matched events to the number of times a target is invoked by a rule.

The following video reviews monitoring and auditing EventBridge behavior through CloudWatch:

EventBridge 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	The number of times a rule’s target isn't invoked in response to an event. This includes invocations that would result in running the same rule again, causing an infinite loop. Valid Dimensions: RuleName Units: Count
Events	The number of partner events ingested by EventBridge. Valid Dimensions: EventSourceName Units: Count
FailedInvocations	The number of invocations that failed permanently. This doesn't include invocations that are retried or invocations that succeeded after a retry attempt. It also doesn't count failed invocations that are counted in DeadLetterInvocations. Note EventBridge only sends this metric to CloudWatch if it isn't zero. Valid Dimensions: RuleName Units: Count
IngestionToInvocationStartLatency	The time to process events measured from when they're ingested by EventBridge to the first invocation of a target in your rules. This is a service-level metric measured across all of your rules and buses and provides an indication of the health of the EventBridge service. Any extended periods of high latency over 30 seconds may indicate a service disruption. Valid Dimensions: None Units: Milliseconds
Invocations	The number of times a target is invoked by a rule in response to an event. This includes successful and failed invocations, but doesn't include throttled or retried attempts until they fail permanently. It doesn't include DeadLetterInvocations. Note EventBridge only sends this metric to CloudWatch if it isn't zero. Valid Dimensions: RuleName Units: Count
InvocationsFailedToBeSentToDlq	The number of invocations that couldn't be moved to a dead-letter queue. Dead-letter queue errors occur due to permissions errors, unavailable resources, or size limits. Note EventBridge only sends this metric to CloudWatch if it isn't zero. Valid Dimensions: RuleName Units: Count
InvocationsSentToDlq	The number of invocations that are moved to a dead-letter queue. Note EventBridge only sends this metric to CloudWatch if it isn't zero. Valid Dimensions: RuleName Units: Count
MatchedEvents	The number of events that matched with any rule. Valid Dimensions: None Units: Count
ThrottledRules	The number of rules that have tried to run but are being throttled. Valid Dimensions: RuleName Units: Count
TriggeredRules	The number of rules that have run and matched with any event. You won't see this metric in CloudWatch until a rule is triggered. Valid Dimensions: RuleName Units: Count

Dimensions for EventBridge metrics

EventBridge metrics have dimensions, or sortable attributes, which are listed below.

Dimension	Description
EventBusName	Filters the available metrics by event bus name.
EventSourceName	Filters the available metrics by partner event source name.
RuleName	Filters the available metrics by rule name.