This topic provides an overview of read-only ApsaraDB RDS instance types. You can view the latest and historical specifications of each type.

ApsaraDB RDS allows you to create read-only instances to scale the read capability of your database system.

For more information about primary instance types, see Primary instance types.

Read-only instance prices

Download the following files to obtain detailed prices:

Subscription Prices for Read-only ApsaraDB RDS Instances (Specifications)

For more information about prices of pay-as-you-go instances and storage capacities, visit the following pages:

Read-only ApsaraDB RDS for MySQL instances

Category MySQL version Instance family Instance type CPU and memory Maximum connections Maximum IOPS Storage capacity
Read-only instance 5.6, 5.7, and 8.0 General-purpose instance family rds.mysql.t1.small 1 CPU core, 1 GB 300 600 5GB-2000GB
rds.mysql.s1.small 1 CPU core, 2 GB 600 1000
rds.mysql.s2.large 2 CPU cores, 4 GB 1200 2000
rds.mysql.s2.xlarge 2 CPU cores, 8 GB 2000 4000
rds.mysql.s3.large 4 CPU cores, 8 GB 2000 5000
rds.mysql.m1.medium 4 CPU cores, 16 GB 4000 7000
rds.mysql.c1.large 8 CPU cores, 16 GB 4000 8000
rds.mysql.c1.xlarge 8 CPU cores, 32 GB 8000 12000
rds.mysql.c2.xlarge 16 CPU cores, 64 GB 16000 14000 5GB-3000GB
rds.mysql.c2.xlp2 16 CPU cores, 96 GB 24000 16000
Dedicated instance family (with a large memory capacity) mysqlro.x8.medium.1 2 CPU cores, 16 GB 2500 4500 50GB-2000GB
mysqlro.x8.large.1 4 CPU cores, 32 GB 5000 9000 50GB-2000GB
mysqlro.x8.xlarge.1 8 CPU cores, 64 GB 10000 18000 500GB-3000GB
mysqlro.x8.2xlarge.1 16 CPU cores, 128 GB 20000 36000 500GB-3000GB
mysqlro.x8.4xlarge.1 32 CPU cores, 256 GB 40000 72000 1000GB-6000GB
mysqlro.x8.8xlarge.1 64 CPU cores, 512 GB 80000 144000 1000GB-6000GB
Dedicated instance family (with a large number of CPU cores) mysqlro.x4.large.1 4 CPU cores, 16 GB 2500 4500 50GB-2000GB
mysqlro.x4.xlarge.1 8 CPU cores, 32 GB 5000 9000 500GB-3000GB
mysqlro.x4.2xlarge.1 16 CPU cores, 64 GB 10000 18000 500GB-3000GB
mysqlro.x4.4xlarge.1 32 CPU cores, 128 GB 20000 36000 1000GB-6000GB

Read-only ApsaraDB RDS for SQL Server instances

Category SQL Server version Instance family Instance type CPU and memory Maximum connections Maximum IOPS Storage capacity
Read-only instance 2017 EE General-purpose instance family rds.mssql.s2.large 2 CPU cores, 4 GB Unlimited See IOPS. 20GB-4000GB
rds.mssql.s3.large 4 CPU cores, 8 GB
rds.mssql.c1.large 8 CPU cores, 16 GB
rds.mssql.s2.xlarge 2 CPU cores, 8 GB
rds.mssql.m1.medium 4 CPU cores, 16 GB
rds.mssql.c1.xlarge 8 CPU cores, 32 GB
rds.mssql.c2.xlarge 16 CPU cores, 64 GB
Dedicated instance family mssql.x4.medium.ro 2 CPU cores, 8 GB
mssql.x4.large.ro 4 CPU cores, 16 GB
mssql.x4.xlarge.ro 8 CPU cores, 32 GB
mssql.x4.2xlarge.ro 16 CPU cores, 64 GB
mssql.x4.4xlarge.ro 32 CPU cores, 128 GB
mssql.x4.8xlarge.ro 64 CPU cores, 256 GB
mssql.x8.medium.ro 2 CPU cores, 16 GB
mssql.x8.large.ro 4 CPU cores, 32 GB
mssql.x8.xlarge.ro 8 CPU cores, 64 GB
mssql.x8.2xlarge.ro 16 CPU cores, 128 GB
mssql.x8.4xlarge.ro 32 CPU cores, 256 GB
mssql.x8.7xlarge.ro 56 CPU cores, 480 GB
mssql.x8.8xlarge.ro 64 CPU cores, 512 GB

Read-only ApsaraDB RDS for PostgreSQL instances (with local SSDs)

Category PostgreSQL version Instance family Instance type CPU and memory Maximum connections Maximum IOPS Storage capacity
Read-only instance

10

Dedicated instance family (with a large memory capacity) pg.x8.xlarge.2 8 CPU cores, 64 GB 10000 18000 20GB-6000GB
pg.x8.2xlarge.2 16 CPU cores, 128 GB 12000 36000
Dedicated instance family (with a large number of CPU cores) pg.x4.xlarge.2 8 CPU cores, 32 GB 5000 9000
pg.x4.2xlarge.2 16 CPU cores, 64 GB 10000 18000
pg.x4.4xlarge.2 32 CPU cores, 128 GB 12000 36000
Dedicated host instance family rds.pg.st.h43 60 CPU cores, 470 GB 4000 50000

Read-only ApsaraDB RDS for PPAS instances

Category PPAS version Instance family Instance type CPU and memory Maximum connections Maximum IOPS Storage capacity
Read-only instance

10

General-purpose instance family rds.ppas.t1.small 1 CPU core, 1 GB 100 1200 150GB
Dedicated instance family ppas.x4.small.2 1 CPU core, 4 GB 200 5000 250GB
ppas.x4.medium.2 2 CPU cores, 8 GB 400 10000
ppas.x8.medium.2 2 CPU cores, 16 GB 2500 15000
ppas.x4.large.2 4 CPU cores, 16 GB 2500 20000 250GB/500GB
ppas.x8.large.2 4 CPU cores, 32 GB 5000 30000
ppas.x4.xlarge.2 8 CPU cores, 32 GB 5000 40000 500GB/1000GB
ppas.x8.xlarge.2 8 CPU cores, 64 GB 10000 60000
ppas.x4.2xlarge.2 16 CPU cores, 64 GB 10000 80000 1000GB/2000GB
ppas.x8.2xlarge.2 16 CPU cores, 128 GB 12000 120000
ppas.x4.4xlarge.2 32 CPU cores, 128 GB 12000 160000 2000GB/3000GB
ppas.x8.4xlarge.2 32 CPU cores, 256 GB 12000 240000
Dedicated host instance rds.ppas.st.h43 60 CPU cores, 470 GB 12000 450000 3000GB/4000GB/5000GB/6000GB