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    Cloud Monitor:Limits

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    Cloud Monitor:Limits

    Last Updated:Jan 08, 2026

    This topic describes the limits of CloudMonitor Basic and Hybrid Cloud Monitoring.

    CloudMonitor Basic

    Feature

    Limitations

    Maximum value

    Alert rule

    Maximum number of alert rules that can be created within an Alibaba Cloud account.

    10,000

    Application group

    Maximum number of tags that can be added to an application group in a region within an Alibaba Cloud account.

    100

    Maximum number of resources of each type in an application group within an Alibaba Cloud account.

    3,000

    Maximum number of application groups that can be created within an Alibaba Cloud account.

    20,000

    Maximum number of availability monitoring tasks that can be created in an application group within an Alibaba Cloud account.

    500

    Maximum number of dynamic rules that can be created within an Alibaba Cloud account.

    1,200

    Host monitoring

    Maximum number of non-Alibaba Cloud hosts that can be managed within an Alibaba Cloud account.

    15,000

    Storage duration

    The storage duration for cloud service monitoring data depends on the statistical period (Period). A longer Period results in less granular data and a longer storage duration. The relationship is as follows:

    • If the Period is less than 60 seconds, the storage duration is 7 days.

    • The period is 60 seconds, and the storage period is 31 days.

    • If the Period is 300 seconds or more, the storage duration is 91 days.

    Hybrid Cloud Monitoring

    Feature

    Limitations

    Maximum value

    Metrics repository

    Maximum number of namespaces that can be created within an Alibaba Cloud account.

    30

    Maximum number of Elastic Compute Service (ECS) instances that can be managed in a namespace within an Alibaba Cloud account.

    10,000

    Resource usage report

    Maximum number of alert contact groups that can be configured for a report task within an Alibaba Cloud account.

    5

    SLS Log Monitoring

    Maximum number of Logstore groups that can be created within an Alibaba Cloud account.

    20

    Maximum number of Logstores that can be added to a Logstore group within an Alibaba Cloud account.

    25

    Alert rule

    Maximum number of Prometheus Query Language (PromQL) alert rules that can be created within an Alibaba Cloud account.

    20

    Smart watcher

    Maximum number of resources that can be added to a smart watcher task.

    100