Billing Methods
A PostgreSQL instance includes instance (vCPUs and memory), and storage, and uses one of the following basic billing methods: subscription, pay-as-you-go. The following table describes the billing item of each billing method.
| Billing Method | Billing Item | Description |
|---|---|---|
| Subscription | - Main Instance type - Read Only Instance type - Local SSD Storage | A billing method that allows you to use PostgreSQL resources only after you pay for them. You must pay for subscription resources before you can use them. |
| Pay-as-you-go | - Main Instance type - Read Only Instance type - Local SSD Storage | A billing method that allows you to use RDS resources and pay for them afterwards. The system generates bills in each billing cycle and deducts corresponding fees from your account. |
Subscription and pay-as-you-go instances support different features. The following table describes the differences:
| Feature | Subscription | Pay-as-you-go |
|---|---|---|
| Purchase | Supported | Supported |
| Release instances | - Not supported | - Supported. - Release pay-as-you-go instances that you no longer need at the earliest opportunity. If you do not release them, the PostgreSQL resources continue to incur charges until the instances are released due to overdue payments. |
| Change configuration | Supported | Supported |
| Renew | Supported | Not supported |