This topic provides an overview of the instance types that are supported for read-only ApsaraDB RDS for SQL Server instances. This overview includes the most recent instance types and the specifications for each instance type.
The subscription and pay-as-you-go billing methods are supported for read-only RDS instances. For more information, see Read-only ApsaraDB RDS instance types. For more information about the prices, go to the buy page.
RDS instances that use cloud disks are deployed on Elastic Compute Service (ECS) instances. The performance of these RDS instances varies based on the instance types of the ECS instances. For more information, see Instance family.
Read-only RDS instances
RDS edition | Instance family | Instance type | Number of CPU cores and memory capacity | Maximum number of connections | Maximum IOPS | Storage capacity |
| General-purpose instance family (not for SQL Server 2022) | rds.mssql.s2.large | 2 cores, 4 GB | Unlimited | For more information, see IOPS. | 20 GB to 32,000 GB |
rds.mssql.s3.large | 4 cores, 8 GB | |||||
rds.mssql.c1.large | 8 cores, 16 GB | |||||
rds.mssql.s2.xlarge | 2 cores, 8 GB | |||||
rds.mssql.m1.medium | 4 cores, 16 GB | |||||
rds.mssql.c1.xlarge | 8 cores, 32 GB | |||||
rds.mssql.c2.xlarge | 16 cores, 64 GB | |||||
Dedicated instance family | mssql.x4.medium.ro | 2 cores, 8 GB | ||||
mssql.x4.large.ro | 4 cores, 16 GB | |||||
mssql.x4.xlarge.ro | 8 cores, 32 GB | |||||
mssql.x4.2xlarge.ro | 16 cores, 64 GB | |||||
mssql.x4.4xlarge.ro | 32 cores, 128 GB | |||||
mssql.x4.8xlarge.ro | 64 cores, 256 GB | |||||
mssql.x8.medium.ro | 2 cores, 16 GB | |||||
mssql.x8.large.ro | 4 cores, 32 GB | |||||
mssql.x8.xlarge.ro | 8 cores, 64 GB | |||||
mssql.x8.2xlarge.ro | 16 cores, 128 GB | |||||
mssql.x8.4xlarge.ro | 32 cores, 256 GB | |||||
mssql.x8.7xlarge.ro | 56 cores, 480 GB | |||||
mssql.x8.8xlarge.ro | 64 cores, 512 GB |