You can set alarm rules probe points in site monitoring, instances in cloud service monitoring, and metrics in customized monitoring.
You can create alarm rules for the probe points in site monitoring. The statistical cycle of alarm rules in site monitoring is same as the detection cycle of the probe points. That means, when the detection cycle of a probe point is 5 minutes, then the statistical cycle of its alarm rule is also 5 minutes. The system monitors the output from the probe point every 5 minutes to check whether the actual value exceeds the threshold value.
You can set alarm rules for the instances in cloud service monitoring. alarm rules can be set for the metrics of each product.
Note: The text message quota for a new user is 1,000 by default. You can submit a service request to the Alibaba Cloud through TradeManager to apply for additional free alarm text messages quota.