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Use preset trigger conditions | The console presets trigger conditions based on the resource subnamespaces to help you quickly configure alert policies. - If the Metric type parameter is set to Multi-metric, you can use the pre-configured trigger condition.
- Select Use preset trigger conditions to automatically specify the Metric type and Trigger condition parameters, which can be modified, deleted, and added.
- If no pre-configured trigger conditions are configured for a subnamespace, you cannot select Use preset trigger conditions.
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| Select the metric type. Valid values: Single-metric and Multi-metric. If you need to monitor multiple metrics of a resource, you can select Multiple metrics. |
| Configure the metrics, duration, statistic type, comparison operator, and threshold for the alert. If the monitored resource metric meets the trigger condition, the system will send an alert notification. - If the Metric type parameter is set to Single metric, only one trigger condition can be set.
- If the Metric type parameter is set to Multiple metrics, one or more trigger conditions can be set.
tip Take note of the following rules when you configure trigger conditions for multiple metrics: - An alert can be triggered if any condition or all conditions are met.
- At least one and up to 10 trigger conditions can be configured.
- You cannot configure duplicate trigger conditions.
- For example, the trigger condition average disk utilization > 80%, lasting for 10 cycles (1 cycle = 1 minute) indicates the system checks the resource metric every 1 minute, and if the average disk utilization of a specific resource exceeds 80% for consecutive 10 cycles, an alert will be triggered.
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| After an alert policy is triggered, if the monitored resource continuously triggers alerts, the system will periodically send alert notifications to prevent excessive notifications. - You can set the alert sending cycle to 5 minutes, 10 minutes, 15 minutes, 30 minutes, 60 minutes, 3 hours, 6 hours, 12 hours, or 24 hours.
- The default value is 5 minutes.
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| - Rule: If any resource in the alert rule continuously exceeds the alert threshold during the alert sending cycle, only one alert notification is sent during the cycle.
- Rule and resource: If different resources in the alert rule continuously exceed the alert threshold during the alert sending cycle, alert notifications will be sent for each resource. If metrics do not recover after the alert sending cycle elapses, Cloud Monitor will send alert notifications again.
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Alert recovery notification | A recovery notification is sent to users after the alert is cleared. The feature is enabled by default. warning An alert recovery notification is sent when the status of an alert policy returns to Normal and Cloud Monitor determines that an alert has recovered. |
| Configure the NoData alert. - Configure a trigger condition. If no data is reported for the specified resource for consecutive n cycles, a NoData alert will be triggered.
- Configure the level of the NoData alert. Valid values: Critical, Warning, and Notice.
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