This topic describes the backup fees for an ApsaraDB RDS for PostgreSQL instance.
A free quota is provided for each RDS instance to store backup files. If the total size of the backup files of your RDS instance does not exceed the free quota, no fees are charged. If the total size exceeds the free quota, you are charged an hourly fee for the excess backup storage that you use. The hourly fee is calculated by using the following formula: Hourly fee for backup storage = (Total size of backup files - Free quota) × Unit price.
|Backup method||Total size of backup files||Free quota (unit: GB; rounded only up to the next integer)||Unit price (USD/GB)|
|Snapshot backup||Total size of backup files = Size of data backup files + Size of log backup files
You can log on to the ApsaraDB RDS console and go to the Basic Information page of your RDS instance. Then, you can view the total size of backup files in the lower-right corner of the page.
|If your RDS instance uses standard SSDs or enhanced SSDs (ESSDs), the free quota is equal to 200% of the storage capacity of your RDS instance.||0.00004|
|Physical backup||If your RDS instance uses local SSDs, the free quota is equal to 50% of the storage capacity of your RDS instance.||0.00020|
The backup fees are based on the total size of backup files. Backup files do not consume the storage capacity of your RDS instance. Therefore, the backup fees do not vary based on the storage usage.
When you analyze the backup fees, you must check the total size of backup files. You do not need to check the storage usage.
Methods of reducing backup usage
You can apply to increase the free quota.
You can expand the storage capacity of your RDS instance. For more information, see Change the specifications of an ApsaraDB RDS for PostgreSQL instance.
The free quota varies based on the storage capacity of your RDS instance. For example, if your RDS instance uses local SSDs and you expand the storage capacity of your RDS instance from 150 GB to 300 GB, the free quota can be increased from 75 GB to 150 GB.