Help Center/ Cloud Eye/ FAQs/ Troubleshooting/ Alarm Management/ Why Is an Alarm Triggered Contrary to the Alarm Rule That Both the Disk Read and Write Metrics Must Reach the Thresholds
Updated on 2025-04-28 GMT+08:00

Why Is an Alarm Triggered Contrary to the Alarm Rule That Both the Disk Read and Write Metrics Must Reach the Thresholds

Symptom

The alarm rule is that both the disk read and write metrics must reach the thresholds, but an alarm was triggered when only one of them reached the threshold.

Possible Causes

The ECS reporting the alarm has more than one disk. The read metric of one disk and the write metric of another disk reached the thresholds.

Currently, cloud product alarms are determined by instance. An alarm can be triggered for an instance as long as the metric of any resource of this instance reaches the threshold, instead of the metric of a specific resource. To configure an alarm rule for a specific resource, you are advised to select Specific dimension for Resource Level.