When the size of your backup files exceeds the free quota of backup space, you can increase the storage space or reduce backup space usage.

The backup files of an instance occupy backup space. Each ApsaraDB for RDS instance provides a quota of free backup space. When the space consumed by backup files exceeds this free quota, charges will be incurred.

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

RDS for MySQL instances equipped with standard or enhanced SSDs support only snapshot backups. The quota that is allocated to store snapshot backups is calculated based on the following formula: Quota = 200% × Storage capacity purchased during instance creation (unit: GB; rounded up).

RDS for MySQL instances equipped with local SSDs support both physical and logical backups. The quota that is allocated to store physical and logical backups is calculated based on the following formula: Quota = 50% × Storage capacity purchased during instance creation (unit: GB; rounded up).

The backup space usage beyond the quota is calculated based on the following formula: Backup space usage beyond the quota= Data backup volume + Log backup volume - Quota.

For example, if the data backup volume is 30 GB, the log backup volume is 10 GB, and the storage capacity purchased during instance creation is 60 GB, then the hourly rate of backup space usage beyond the quota is calculated as follows: Hourly rate of backup space usage beyond the quota = 30 + 10 - 50% × 60 = 10 (GB). This means that you must pay for an additional 10 GB of storage space per hour.

Note
  • For more information about the hourly rate of backup space usage beyond the quota, see the pricing information at ApsaraDB for RDS.
  • The Basic Edition used with some database engines allows you to store backups that are generated during the last seven days. The storage is free of charge. For more information, go to the ApsaraDB for RDS console.Basic Edition screenshot

Solutions

Use the following solutions to resolve the problem:

FAQ

Can uploading binlogs reduce backup space usage?

Uploaded binlogs are log backup files and thus still occupy backup space. In this case, backup space usage is not reduced.