Posted On: Apr 12, 2019
When the Amazon RDS storage is using more than one underlying physical device, Enhanced Monitoring collects the data for each device. In addition, when the DB instance is running in a Multi-AZ configuration, the data for each device on secondary host is collected as well secondary host metrics.
Both physical device and Multi-AZ secondary host metrics are available on RDS for Oracle, PostgreSQL and MySQL. With data reported on each physical device, you can see how many physical devices make up their volumes, if I/O is balanced across physical devices, and see if latency is consistent across physical devices.
For a complete list of available metrics and more information on how to use this feature, see Enhanced Monitoring documentation. You can seamlessly integrate Enhanced Monitoring with third-party applications to monitor your Amazon RDS DB instances. Once you enable Enhanced Monitoring, you will incur standard CloudWatch Logs charges. For more details on pricing, go to CloudWatch Logs pricing.