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Target customers: ApsaraDB RDS for MySQL users. Features released: Alert rules of ApsaraDB RDS for MySQL are optimized. 1. The alerting frequency for metrics such as CPU utilization is shortened from 5 minutes to 1 minute. 2. The following metrics are introduced: the number of active sessions, the volume of data with DELETE operations per second, the volume of data with INSERT operations per second, the number of data with both INSERT and SELECT operations per second, the volume of data with REPLACE operations per second, the volume of data with both REPLACE and SELECT operations per second, the volume of data with SELECT operations per second, the volume of data with UPDATE operations per second, the number of logical read operations per second, the number of logical write operations per second, the volume of data queried per second, the number of transactions executed per second, the bandwidth of inbound traffic, and the bandwidth of outbound traffic.