To continuously improve the accuracy of CloudMonitor metrics, CloudMonitor will update the following basic monitoring metrics for MaxCompute starting from 12:00:00 (UTC+8) on June 10, 2026: tunnel_slot_exceeded_origin, TunnelErrorCodeBT, TunnelCommitQPMBT, and TunnelSlotQuotaByTenant.

• Upgrade Content: The metric timestamps will be uniformly adjusted to right-aligned.
• Upgrade Impact: This upgrade will not affect existing alert rules or historical data. However, around the changeover time, monitoring data may experience temporary issues (such as repeated timestamps or brief data loss due to task restarts). After the upgrade, this will eliminate a statistical deviation of approximately 60 seconds, reduce monitoring and alerting latency, and improve the timeliness of anomaly detection.