※ Pay-As-You-Go (PAYG)
Actually, prices are vary from region to region, go to Purchase Page for details.
* Instance Fees
For billing method, you can choose from PAYG and Subscription.
* Storage Fees
For billing method, it is same to your instance.
* Traffic Fees
So far, we don't charge you for traffic of inbound or outbound.
* Read-Only Instance & Storage Fees
The use of read-only instances is optional, you will be charged for instances and storage in the billing method of your choice (PAYG or subscription).
* SQL Auditing
Free to use, no matter to enable or disabled the function, you won't be charged.
* Performance Monitoring Fees
Free monitoring service is offered at a frequency of once per 300 seconds.
* Backup Fees
As an additional function, basically, the backup feature is free to use, but not free for storage use. You can choose from snapshot or physical backup based on your instance storage type. And By default, you won't be charged for snapshot backup storage use within 200% of your instance storage capacity, or for physical backup storage use within 50% of your instance storage capacity. Otherwise, you will be charged on a PAYG basis. Please refer to Backup storage pricing for an ApsaraDB RDS for MySQL instance for more details.
For more information about specs and selection suggestions, please refer to Instance specifications.