CloudWatch usage metrics

Amazon Managed Service for Prometheus vends usage metrics to CloudWatch. These metrics provide visibility about your workspace utilization. The vended metrics can be found in the AWS/Usage CloudWatch namespace and the AWS/Prometheus namespace. These metrics are available in CloudWatch free of charge. For more information about usage metrics, see CloudWatch Usage Metrics.

CloudWatch metric name	Resource name	CloudWatch Namespace	Description
ResourceCount	IngestionRate	AWS/Usage	Sample ingestion rate
ResourceCount	ActiveSeries	AWS/Usage	Number of active series per workspace
ResourceCount	ActiveAlerts	AWS/Usage	Number of active alerts per workspace
ResourceCount	SizeOfAlerts	AWS/Usage	Alerts per workspace, in bytes
AlertManagerAlertsReceived	-	AWS/Prometheus	Total successful alerts delivered
AlertManagerNotificationsThrottled	-	AWS/Prometheus	Number of throttled alerts
DiscardedSamples*	-	AWS/Prometheus	Number of discarded samples by reason
RuleEvaluations	-	AWS/Prometheus	Total number of rule evaluations
RuleEvaluationFailures	-	AWS/Prometheus	Number of rule evaluation failures in the interval
RuleGroupIterationsMissed	-	AWS/Prometheus	Number of Rule Group iterations missed in the interval.

^*Some of the reasons that cause samples to be discarded from being ingested are as follows:

Reason	Meaning
greater_than_max_sample_age	Discarding log lines which are older than the current time
new-value-for-timestamp	Duplicate samples are sent with a different timestamp than was previously recorded
per_metric_series_limit	User has hit the active series per metric limit
per_user_series_limit	User has hit the total number of active series limit
rate_limited	Ingestion rate limited
sample-out-of-order	Samples are sent out of order and cannot be processed
label_value_too_long	Label value is longer than allowed character limit
max_label_names_per_series	User has hit the label names per metric
missing_metric_name	Metric name is not provided
metric_name_invalid	Invalid metric name provided
label_invalid	Invalid label provided
duplicate_label_names	Duplicate label names provided

Note

A metric not existing or missing is the same as the value of that metric being 0.

Note

RuleGroupIterationsMissed, RuleEvaluations and RuleEvaluationFailureshave the RuleGroup dimension of the following structure:

RuleGroupNamespace;RuleGroup

Setting a CloudWatch alarm on Prometheus vended metrics

You can monitor usage of Prometheus resources using the CloudWatch alarm feature.

To set an alarm on the number of ActiveSeries in Prometheus

1. Choose the Graphed metrics tab and scroll down to the ActiveSeries label.

   In the Graphed metrics view, only the metrics currently being ingested will appear.

2. Choose the bell icon in the Actions column.

   

3. In Specify metric and conditions, enter the threshold condition in the Conditions value field and choose Next.

4. In Configure actions, select an existing SNS topic or create a new SNS topic to send the notification to.

5. In Add name and description, add the name of the alarm and an optional description.

6. Choose Create alarm.