CloudWatch service quotas

You can use the table in this section to learn about alarms, alarm email notifications, and API requests in Amazon CloudWatch.

Note

For some AWS services including CloudWatch, you can use the CloudWatch usage metrics to visualize your current service usage on CloudWatch graphs and dashboards. You can use a CloudWatch metric math function to display the service quotas for those resources on your graphs. You can also configure alarms that alert you when your usage approaches a service quota. For more information, see Visualizing your service quotas and setting alarms.

Resource	Default quota
Amazon AI Operations	2 concurrent investigations with active AI analysis per account per Region. 1 investigation group can be created per account in a Region. 150 AI-assisted investigations per month in this account in the current Region. These quotas can't be changed.
Alarm actions	5/alarm. This quota can't be changed.
Alarm evaluation period	This is calculated by multiplying the alarm period by the number of evaluation periods used. The maximum value is seven days for alarms with a period of at least one hour (3600 seconds). The maximum is one day for alarms with a shorter period, and the maximum is one day for alarms using the custom Lambda data source. This quota can't be changed.
Alarms	10/month/customer for free. Additional alarms incur charges. No limit on the total number of alarms per account. Alarms based on metric math expressions can have up to 10 metrics. 200 Metrics Insights alarms per Region. You can request a quota increase.
Anomaly detection models	500 per Region, per account.
API requests	1,000,000/month/customer for free.
Application Signals API requests	The following APIs have a quota of 10 transactions per second (TPS) and per Region. You can request a quota increase. BatchGetServiceLevelObjectiveBudgetReport GetService ListServiceDependencies ListServiceDependents ListServiceOperations ListServices The following APIs have a quota of 5 transactions per second (TPS) and per Region. You can request a quota increase. CreateServiceLevelObjective DeleteServiceLevelObjective GetServiceLevelObjective ListServiceLevelObjectives ListTagsForResource StartDiscovery TagResource UntagResource UpdateServiceLevelObjective
SLOs	Maximum number of SLOs supported per Region per account: 250 Maximum number of SLOs supported per Service: 100 You can request a quota increase.
Canaries	200 per Region per account. You can request a quota increase.
Contributor Insights API requests	The following APIs have a quota of 20 transactions per second (TPS) and per Region. DescribeInsightRules The quota can't be changed. GetInsightRuleReport You can request a quota increase. The following APIs have a quota of 5 TPS per Region. This quota can't be changed. DeleteInsightRules PutInsightRule The following APIs have a quota of 1 TPS per Region. This quota can't be changed. DisableInsightRules EnableInsightRules
Contributor Insights rules	100 rules per Region per account. You can request a quota increase.
Custom metrics	No quota.
Dashboards	Up to 500 widgets per dashboard. Up to 500 metrics per dashboard widget. Up to 2500 metrics per dashboard, across all widgets. These quotas include all metrics retrieved for use in metric math functions, even if those metrics are not displayed on the graph. These quotas can't be changed.
DescribeAlarms	9 transactions per second (TPS) per Region. The maximum number of operation requests you can make per second without being throttled. You can request a quota increase.
DescribeAlarmHistory	20 transactions per second (TPS) per Region. The maximum number of operation requests you can make per second without being throttled. This quota can't be changed.
DeleteAlarms request DisableAlarmActions request EnableAlarmActions request SetAlarmState request	3 TPS per Region for each of these operations. The maximum number of operation requests you can make per second without being throttled. These quotas can't be changed.
DescribeAlarmsForMetric request	9 TPS per Region. The maximum number of operation requests you can make per second without being throttled. This quota can't be changed.
DeleteDashboards request GetDashboard request ListDashboards request PutDashboard request	10 TPS per Region for each of these operations. The maximum number of operation requests you can make per second without being throttled. These quotas can't be changed.
PutAnomalyDetector DescribeAnomalyDetectors	10 TPS per Region. The maximum number of operation requests you can make per second without being throttled.
DeleteAnomalyDetector	5 TPS per Region. The maximum number of operation requests you can make per second without being throttled.
Dimensions	30/metric. This quota can't be changed.
GetMetricData	10 TPS per Region for operations that include Metrics Insights queries. For operations that do not include Metrics Insights queries, the quota is 50 TPS per Region. This is the maximum number of operation requests you can make per second without being throttled. You can request a quota increase. For `GetMetricData` operations that include a Metrics Insights query, the quota is 4,300,000 Datapoints Per Second (DPS) for the most recent 3 hours. This is calculated against the total number of data points scanned by the query (which can include no more than 10,000 metrics.) 180,000 Datapoints Per Second (DPS) if the `StartTime` used in the API request is less than or equal to three hours from current time. 396,000 DPS if the `StartTime` is more than three hours from current time. This is the maximum number of datapoints you can request per second using one or more API calls without being throttled. This quota can't be changed. The DPS is calculated based on estimated data points, not actual data points. The data point estimate is calculated using the requested time range, period, and retention period. This means that if the actual data points in the requested metrics are sparse or empty, throttling still occurs if the estimated data points exceed the quota. The DPS quota is per-Region.
GetMetricData	A single `GetMetricData` call can include the following: As many as 500 `MetricDataQuery` structures. As many as 100 `SERVICE_QUOTA()` functions. As many as 100 `SEARCH()` functions. As many as 5 `LAMBDA()` functions. These quotas can't be changed.
GetMetricStatistics	400 TPS per Region. The maximum number of operation requests you can make per second without being throttled. You can request a quota increase.
GetMetricWidgetImage	Up to 500 metrics per image. This quota can't be changed. 20 TPS per Region. The maximum number of operation requests you can make per second without being throttled. You can request a quota increase.
ListMetrics	25 TPS per Region. The maximum number of operation requests you can make per second without being throttled. You can request a quota increase.
Metric data values	The value of a metric data point must be within the range of -2^360 to 2^360. Special values (for example, NaN, +Infinity, -Infinity) are not supported. This quota can't be changed.
MetricDatum items	1000/PutMetricData request. A MetricDatum object can contain a single value or a StatisticSet object representing many values. This quota can't be changed.
Metrics	10/month/customer for free.
Metrics Insights queries	A single query can process no more than 10,000 metrics. This means that if the SELECT, FROM, and WHERE clauses would match more than 10,000 metrics, only the first 10,000 of these metrics that are found will be processed by the query. A single query can return no more than 500 time series. You can query only the most recent three hours of data
Metrics Insights query generator requests	As many as five concurrent natural-language generated requests.
Observability Access Manager (OAM) API request rates.	1 TPS per Region for PutSinkPolicy. 10 TPS per Region for each other CloudWatch OAM API. These quotas reflect the maximum number of operation requests you can make per second without being throttled. These quotas can't be changed.
OAM source account links	Each source account can be linked to as many as 5 monitoring accounts This quota can't be changed.
OAM sinks	1 sink per Region per account This quota can't be changed.
PutCompositeAlarm request	3 TPS per Region. The maximum number of operation requests you can make per second without being throttled. You can request a quota increase.
PutDashboard payload size	The payload of `PutDashboard` requests can be up to 1 MB. This quota can't be changed.
PutMetricAlarm request	3 TPS per Region. The maximum number of operation requests you can make per second without being throttled. You can request a quota increase.
PutMetricData request	1MB for HTTP POST requests. PutMetricData can handle 500 transactions per second (TPS), which is the maximum number of operation requests that you can make per second without being throttled. `PutMetricData` can handle 1,000 metrics per request. You can request a quota increase.
Amazon SNS email notifications	1,000/month/customer for free.
Synthetics Groups	20 per account. This quota can't be changed.
TagResource	20 TPS per Region. The maximum number of operation requests you can make per second without being throttled. This quota can't be changed.
UntagResource	20 TPS per Region. The maximum number of operation requests you can make per second without being throttled. This quota can't be changed.

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