This topic provides an overview of read-only ApsaraDB RDS for SQL Server instance types. This overview includes the most recent instance types and the specifications for each instance type.

Read-only ApsaraDB RDS for SQL Server instances

Role Database engine version Instance family Instance type CPU and memory specifications Maximum number of connections Maximum IOPS Storage capacity
Read-only instance management SQL Server 2017 EE and SQL Server 2019 EE General-purpose instance family rds.mssql.s2.large 2 cores, 4 GB Unlimited For more information, see Maximum IOPS for standard SSDs and ESSDs. 20GB-4000GB
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