Quotas and limits

To ensure efficient operation, Stackdriver Monitoring imposes the following usage limits.

Custom metrics

Category Maximum value
Active time series1 100,000
Custom metric descriptors per project2 500
Labels per metric descriptor 10
String length for label key 100
String length for label value 1024
Time series included in a request3 200
Rate at which data can be written to a single time series one point per minute
Histogram buckets per custom distribution metric 200
Prometheus4-exported metric descriptors per project 10,000

1 A time series is active if you have written data points to it within the last 24 hours. The number of active time series is recorded in the metric monitoring.googleapis.com/stats/num_time_series.
2 This limit is imposed by Stackdriver Monitoring. Other services might impose lower limits.

3 You can write only one data point for each time series in a request, so this limit also functions as the maximum number of points that can be written per request.
4 Prometheus is a monitoring tool often used with Kubernetes. See Using Prometheus for more information.

Monitoring API quotas and limits

Category Maximum value
Limits to API usage See the API dashboard. Click an API and select Quotas to see your quota.
Lifetime of API page tokens 24 hours

Requesting more quota

You can request higher Stackdriver Monitoring API limits using the Google Cloud Console:

  1. In the Quotas page, use the checkboxes to select Stackdriver Monitoring API, then click EDIT QUOTAS.

    Billing must be enabled on the project in order to click the checkboxes.

  2. In the Edit Quotas panel, complete the form with your Name, Email , and Phone details, then click Next.

  3. In the Edit Quotas panel, select the service to expand the view, then edit the quotas in that service to your requested limit. Click Done.

  4. Click Submit request.

You can also contact Google Cloud Support to request more Monitoring API quota. The other limits are fixed and as detailed on this page.

For more information, go to Working with quotas.

Data retention

Metric data points older than the retention period are deleted from time series.

Category Value
Retention of metric data points 6 weeks
Lifetime of API page tokens 24 hours

Resource groups

Category Value
Number of resource groups per Workspace 500
Maximum number of groups included in an email report1 10

1 When you configure Stackdriver email reports (Workspace Settings > Email reports), you can request information on utilization of your resource groups. Due to a limitation in the email reporter, the generated reports include information for only 10 groups.

Workspace limits

A Workspace can contain up to 100 Google Cloud projects. See Using Workspaces for more information.

Limits for alerting and uptime checks

Category Value
Uptime checks per Workspace 100
Alerting policies per Workspace 500
Conditions per alerting policy 6
Notification channels per alerting policy 16
Notification channels per Workspace 4000
Simultaneously open incidents per alerting policy 5000

Limits for charting

Category Value
Charts on a dashboard 25
Lines on a chart 300
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