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Cloud Monitor

Overview

Limits

This topic describes the usage limits on account usage and product features of Cloud Monitor.

Account limits

The following table describes the limits when you use Cloud Monitor by using a single Volcano Engine root user.

Limit	Limit Description
Storage duration for historical monitoring data	The data storage duration for metrics of different cloud products is 30 days, 60 days, or 90 days. For details, see Cloud product metrics. The data of cloud product events can be retained for 30 days.
Alert record	An alert record can be stored for up to 14 days. Up to 5,000 alert records can be displayed.
Alert policy	Up to 1,000 alert policies can be created within one account. If you associate all resources in a region with an alert object, the number of alert policies is not limited. If you associate part of the resources in a region with an alert object, the number of resources is limited by the following rules: Up to 1,000 resources of the same type can be added to an alert policy. Up to 5,000 resources of all types can be added to an alert policy. When you select resources by resource name, project and label, up to 1000 resources can be matched. Up to five alert contact groups can be associated with each alert policy. Each alert policy can contain up to 1,000 resources when an alert is generated during each check exception.
Event rule	Up to 1,000 event rules can be created within one account.
Object group	One object group can be bound to only one alert template. Up to 100 object groups can be created within a root user. Up to 100 resource types can be added to an object group. Up to 1,000 resources of the same type can be added to an object group. Up to 5,000 resources can be added to an object group. When you select resources by resource name, project, and label, up to 1000 resources can be matched.
Alert contact person	Up to 100 alert contacts can be created. One alert contact can be associated with up to 10 alert contact groups.
Alert contact group	Up to 100 alert contact groups can be created. Up to 100 alert contacts can be created in an alert contact group.
Suppression policy	Up to 1,000 suppression policies can be created within one account.

Alert notification limit

Limit	Limit Description
Phone call	A phone number can receive up to 300 phone calls per day. A phone number can receive up to 1 phone call and 3 text messages per minute. A root user and its Identity and Access Management (IAM) users can receive up to 300 phone calls per hour and up to 100 phone calls per minute. Resources are not listed in phone call notifications.
Text message	A phone number can receive up to 300 text message notifications per day. A phone number can receive up to 1 phone call notification and 3 text message notifications per minute. A root user and its IAM users can receive up to 300 text message notifications per hour and up to 100 text message notifications per minute. Up to three resources can be listed in an SMS notification.
Email	An email address can receive up to 100 email notifications per minute. An account can receive up to 100 email notifications per minute. Up to 10 resources can be listed in an email notification.
Alert callback	You can enter up to one publicly accessible URL or select up to eight created callback URLs for an alert policy. A root user and its IAM users can receive up to 100 email notifications per minute. A root user and its IAM users can receive up to 100 Webhook notifications per minute. All resources will be listed in dedicated webhooks and sent in batches. Up to 100 resources can be sent per batch. A root user and its IAM users can receive up to 20 Lark, WeCom, and DingTalk notifications per minute. Up to 10 resources can be listed in a notification. The number of listed resources in a WeCom notification may be less than 10 because a WeCom message can be up to 4096 bytes in length.

Contact limits

Limit	Limit Description
Email	The same email address can receive only one verification email per minute. An account can send up to 100 verification emails per minute. If the upper limit is exceeded, contacts can be created or updated, but the activation email will not be received. Wait for a while and then update the email address again to trigger the activation email.
Text message	The same mobile number can receive only one verification SMS message per minute. An account can send up to 100 verification SMS messages per minute. If the upper limit is exceeded, contacts can be created or updated, but the activation SMS message will not be received. Wait for a while and then update the mobile number again to trigger the activation SMS message.

Cloud product limits

Limit	Limit Description
Conditions for resource recovery after an alert is triggered	If the monitoring data of a resource does not reach the alert threshold for five consecutive minutes, the resource returns to a normal status.
Number of disks that can be displayed on the OperateSystemMonitor page of an ECS instance	Monitoring data of up to 20 disks can be displayed.
Number of disks that can be associated with the same alert policy	If you associate all disks, the number of disks is not limited. If you associate specific disk partitions, up to 50 disks can be selected.

Last updated: 2026.07.10 14:02:21