Menu
Amazon CloudWatch
User Guide

CloudWatch Limits

CloudWatch has the following limits:

ResourceDefault Limit

Actions

5/alarm. This limit cannot be changed.

Alarms

10/month/customer for free. 5000/account.

API requests

1,000,000/month/customer for free.

Custom metrics

No limit.

DescribeAlarms

3 transactions per second (TPS). The maximum number of operation requests you can make per second without being throttled.

You can request a limit increase.

Dimensions

10/metric. This limit cannot be changed.

GetMetricStatistics

400 transactions per second (TPS). The maximum number of operation requests you can make per second without being throttled.

You can request a limit increase.

ListMetrics

25 transactions per second (TPS). The maximum number of operation requests you can make per second without being throttled.

You can request a limit increase.

Metric data

15 months. This limit cannot be changed.

MetricDatum items

20/PutMetricData request. A MetricDatum object can contain a single value or a StatisticSet object representing many values. This limit cannot be changed.

Metrics

10/month/customer for free.

Period

One day (86,400 seconds). This limit cannot be changed.

PutMetricAlarm request

3 transactions per second (TPS). The maximum number of operation requests you can make per second without being throttled.

You can request a limit increase.

PutMetricData request

8 KB for HTTP GET requests and 40 KB for HTTP POST requests. PutMetricData can handle 150 transactions per second (TPS), which is the maximum number of operation requests you can make per second without being throttled.

You can request a limit increase.

Amazon SNS email notifications

1,000/month/customer for free.