This topic provides an overview of the instance types supported for read-only ApsaraDB RDS for SQL Server instances. The overview includes the most recent instance types and specifications for each instance type.
Read-only ApsaraDB RDS for SQL Server instances support two billing methods: subscription and pay-as-you-go (Serverless is not supported yet). The actual prices are subject to the sales page.
ApsaraDB RDS for SQL Server instances with disk-based storage are built on Elastic Compute Service (ECS). Different instances may use different ECS instance families, which may lead to performance differences.
Read-only ApsaraDB RDS for SQL Server instances
The actual maximum IOPS and maximum I/O throughput during runtime are determined by the storage class, storage capacity, and instance type. The final value is the minimum of the "instance type limit" and the "storage limit".
The instance type limit: The values listed in the following table only reflect the limits of maximum IOPS and maximum I/O throughput based on the instance type, which are preset based on the hardware performance of the instance type.
The storage limit: For the impact of storage on maximum IOPS and maximum I/O throughput, you can calculate using the formula for calculating maximum IOPS or the formula for calculating maximum throughput.
Instance version | Instance type code | CPU and memory | Maximum connections | Maximum IOPS | Maximum I/O throughput (MB/S) | Storage capacity | |
| General-purpose | rds.mssql.s2.large | 2 cores, 4 GB memory | Unlimited | 10000 | 128 | 20GB-32000GB |
rds.mssql.s3.large | 4 cores, 8 GB memory | 20000 | 192 | ||||
rds.mssql.c1.large | 8 cores, 16 GB memory | 25000 | 256 | ||||
rds.mssql.s2.xlarge | 2 cores, 8 GB memory | 10000 | 128 | ||||
rds.mssql.m1.medium | 4 cores, 16 GB memory | 20000 | 192 | ||||
rds.mssql.c1.xlarge | 8 cores, 32 GB memory | 25000 | 256 | ||||
rds.mssql.c2.xlarge | 16 cores, 64 GB memory | 40000 | 384 | ||||
Dedicated | mssql.x4.medium.ro | 2 cores, 8 GB memory | 10000 | 128 | |||
mssql.x4.large.ro | 4 cores, 16 GB memory | 20000 | 192 | ||||
mssql.x4.xlarge.ro | 8 cores, 32 GB memory | 25000 | 256 | ||||
mssql.x4.2xlarge.ro | 16 cores, 64 GB memory | 40000 | 384 | ||||
mssql.x4.4xlarge.ro | 32 cores, 128 GB memory | 60000 | 640 | ||||
mssql.x4.8xlarge.ro | 64 cores, 256 GB memory | 120000 | 1280 | ||||
mssql.x8.medium.ro | 2 cores, 16 GB memory | 10000 | 128 | ||||
mssql.x8.large.ro | 4 cores, 32 GB memory | 20000 | 192 | ||||
mssql.x8.xlarge.ro | 8 cores, 64 GB memory | 25000 | 256 | ||||
mssql.x8.2xlarge.ro | 16 cores, 128 GB memory | 40000 | 384 | ||||
mssql.x8.4xlarge.ro | 32 cores, 256 GB memory | 60000 | 640 | ||||
mssql.x8.7xlarge.ro | 56 cores, 480 GB memory | 120000 | 1280 | ||||
mssql.x8.8xlarge.ro | 64 cores, 512 GB memory | 120000 | 1280 |