The Service-Level Agreement (SLA) for ApsaraDB RDS instances running High-availability Edition and Cluster Edition with multi-zone deployment is increased to 99.995% or 99.997%, depending on the number of zones.
Effective date
June 19, 2025
Details
Spreading your RDS instance across more zones means it can survive outages in individual zones — and the SLA reflects that. The new SLA values apply to instances running High-availability Edition and Cluster Edition with multi-zone deployment:
Two zones: SLA increases to 99.995%
Three or more zones: SLA increases to 99.997%
The following table shows the SLA before and after the improvement for each affected instance type.
| RDS instance | Deployed zones | Edition | SLA before | SLA after |
|---|---|---|---|---|
| RDS for MySQL | Two zones | High-availability Edition and Cluster Edition | Dedicated instances: 99.99% General-purpose instances: 99.95% | 99.995% |
| RDS for MySQL | Three or more zones | Cluster Edition | 99.99% | 99.997% |
| RDS for PostgreSQL | Two zones | High-availability Edition and Cluster Edition | Dedicated instances: 99.99% General-purpose instances: 99.95% | 99.995% |
| RDS for PostgreSQL | Three or more zones | Cluster Edition | None | 99.997% |
| RDS for SQL Server | Two zones | High-availability Edition and Cluster Edition | Dedicated instances: 99.99% General-purpose instances: 99.95% | 99.995% |
| RDS for MariaDB | Two zones | High-availability Edition | Dedicated instances: 99.99% General-purpose instances: 99.95% | 99.995% |
The SLA remains unchanged for:
Instances deployed in a single zone (regardless of edition: Basic Edition, High-availability Edition, or Cluster Edition)
Instances running RDS Enterprise Edition