This topic describes how to calculate and view the quota of free backup space for an RDS for PPAS instance. The quota varies depending on the used DB engine version and edition. Additionally, this topic describes how to calculate the backup space beyond the quota.

Backup files occupy backup space. Each RDS instance has a specific quota of free backup space. If the total size of backup files exceeds the quota, additional fees are incurred.

Calculate the quota of free backup space and the backup space beyond the quota

Quota of free backup space = Round up (50% × Storage space purchased for the RDS instance) (Unit: GB)

Backup space beyond the quota = Backup data size + Backup log size - Round up (50% × Storage space purchased for the RDS instance) (Unit: GB)

For example, the backup data size is 30 GB, the backup log size is 10 GB, and the storage space is 60 GB, then you must pay for 10-GB storage space every hour:
Hourly fees = 30 + 10 - 50% × 60 = 10 (GB)
Note
  • For more information about the hourly fees for the backup space beyond the quota, see ApsaraDB RDS for MySQL pricing.
  • The Basic Editions of some DB engines store backup files generated within the last seven days for free. For more information, log on to the RDS console.
    基础版截图

View the quota of free backup space in the RDS console

  1. Log on to the RDS console.
  2. In the upper-left corner, select the region where the target RDS instance is located.
    选择地域
  3. Find the target RDS instance and click its ID.
  4. In the Usage Statistics section of the Basic Information page, view the data size next to Space Used for Backup. The data size is the quota of free backup space.
    Note The quota of free backup space varies depending on the instance type. The following figure is only an example.

    使用量统计