RDS resource plan definition and billing description-ApsaraDB RDS(RDS)-阿里云帮助中心

ApsaraDB RDS offers subscription resource plans, including storage plans and compute plans. These plans are a cost-effective alternative to the pay-as-you-go billing method. You can save more by purchasing plans with larger capacities and longer subscription durations.

Deductible items

Storage plans and compute plans can be used to offset the following billable items for RDS PostgreSQL instances:

Item	Compute Plan	Storage plan
Deductible items	Compute resources of pay-as-you-go primary instances. Compute resources of pay-as-you-go read-only instances. Database proxy compute resources for primary instances that are pay-as-you-go or subscription.	Storage space of pay-as-you-go instances (excluding Premium ESSDs). Backup storage for subscription and pay-as-you-go instances (excluding Premium ESSDs). SQL Audit usage for subscription and pay-as-you-go instances.
Supported regions	Available in some regions in the Chinese mainland: China (Hangzhou), China (Shanghai), China (Qingdao), China (Beijing), China (Zhangjiakou), China (Hohhot), China (Ulanqab), China (Shenzhen), China (Heyuan), China (Guangzhou), and China (Chengdu)	Available in some regions in the Chinese mainland: China (Hangzhou), China (Shanghai), China (Qingdao), China (Beijing), China (Zhangjiakou), China (Hohhot), China (Ulanqab), China (Shenzhen), China (Heyuan), China (Guangzhou), and China (Chengdu)
Quantity	Multiple plans can be purchased and stacked.	Multiple plans can be purchased and stacked.
Offset order	If you have multiple compute plans, the plan that expires soonest is used first.	If you have multiple storage plans, the plan that expires soonest is used first.
Renewal, Unsubscription	Not supported	Not supported
Upgrade/Downgrade	Not supported	Not supported

For more information, see Storage plans and Compute plans.