To ensure data accuracy, the calculation methods for the CloudMonitor metrics of ApsaraDB for MongoDB Edition will be optimized and adjusted starting from 00:00:00 on August 29, 2025 (UTC+8).

The list of involved metrics is as follows:

1. MetricName：ShardingDonorChunkStarts；type：ApsaraDB for MongoDB Shard cluster Instances
2. MetricName：ShardingRecipientChunkStarts；type：ApsaraDB for MongoDB Shard cluster Instances
3. MetricName：MoveChunkDeleterTask ；type：ApsaraDB for MongoDB Replica Set Instances

After the change in the metric calculation methods:

• When querying historical data, you can only view data from up to 14 days ago.
• The displayed Average, Maximum, and Minimum values will be more accurate.

We apologize for any inconvenience this may cause. If you have any questions, please feel free to contact us through work orders or the service hotline.