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

Note The subscription and pay-as-you-go billing methods are supported for read-only ApsaraDB RDS for PostgreSQL instances. For more information, see Read-only ApsaraDB RDS instance types. For more information about the prices, go to the buy page.

Read-only ApsaraDB RDS for PostgreSQL instances with local SSDs

Database engine version Instance family Instance type CPU and memory specifications Maximum number of connections Maximum IOPS Storage capacity

PostgreSQL 10

Dedicated instance family (with a large memory capacity) pg.x8.xlarge.2 8 cores, 64 GB 10,000 18,000 20 GB to 6,000 GB
pg.x8.2xlarge.2 16 cores, 128 GB 12,000 36,000
Dedicated instance family (with a large number of cores) pg.x4.xlarge.2 8 cores, 32 GB 5,000 9,000
pg.x4.2xlarge.2 16 cores, 64 GB 10,000 18,000
pg.x4.4xlarge.2 32 cores, 128 GB 12,000 36,000
Dedicated host instance family rds.pg.st.h43 60 cores, 470 GB 4,000 50,000

Read-only ApsaraDB RDS for PostgreSQL instances with standard SSDs or enhanced SSDs (ESSD)

Database engine version Instance family Instance type CPU and memory specifications Maximum number of connections Maximum IOPS Storage capacity
PostgreSQL 14 PostgreSQL 13, PostgreSQL12, PostgreSQL11, and PostgreSQL 10 Dedicated instance family pgro.x2.medium.1c 2 cores, 4 GB 400 For more information, see Maximum IOPS for standard SSDs and ESSDs. 50 GB to 32,000 GB
pgro.x2.large.1c 4 cores, 8 GB 800
pgro.x2.xlarge.1c 8 cores, 16 GB 1,600
pgro.x2.3large.1c 12 cores, 24 GB 2,400
pgro.x2.2xlarge.1c 16 cores, 32 GB 3,200
pgro.x2.3xlarge.1c 24 cores, 48 GB 4,800
pgro.x2.4xlarge.1c 32 cores, 64 GB 6,400
pgro.x2.13large.1c 52 cores, 96 GB 9,600
pgro.x2.8xlarge.1c 64 cores, 128 GB 12,800
pgro.x2.13xlarge.1c 104 cores, 192 GB 19,200
pgro.x4.medium.1c 2 cores, 8 GB 800
pgro.x4.large.1c 4 cores, 16 GB 1,600
pgro.x4.xlarge.1c 8 cores, 32 GB 3,200
pgro.x4.3large.1c 12 cores, 48 GB 4,800
pgro.x4.2xlarge.1c 16 cores, 64 GB 6,400
pgro.x4.3xlarge.1c 24 cores, 96 GB 9,600
pgro.x4.4xlarge.1c 32 cores, 128 GB 12,800
pgro.x4.13large.1c 52 cores, 192 GB 19,200
pgro.x4.8xlarge.1c 64 cores, 256 GB 25,600
pgro.x4.13xlarge.1c 104 cores, 384 GB 38,400
pgro.x8.medium.1c 2 cores, 16 GB 1,600
pgro.x8.large.1c 4 cores, 32 GB 3,200
pgro.x8.xlarge.1c 8 cores, 64 GB 6,400
pgro.x8.3large.1c 12 cores, 96 GB 9,600
pgro.x8.2xlarge.1c 16 cores, 128 GB 12,800
pgro.x8.3xlarge.1c 24 cores, 192 GB 19,200
pgro.x8.4xlarge.1c 32 cores, 256 GB 25,600
pgro.x8.13large.1c 52 cores, 384 GB 38,400
pgro.x8.8xlarge.1c 64 cores, 512 GB 51,200
pgro.x8.13xlarge.1c 104 cores, 768 GB 76,800

Read-only ApsaraDB RDS for PostgreSQL instances with the new general-purpose instance types

Note The new general-purpose instance types of ApsaraDB RDS for PostgreSQL provide better scalability and higher performance than the previous general-purpose instance types. In addition, the amount of time that is required to create an RDS instance and the amount of time that is required to change the specifications of an RDS instance are reduced. If a primary RDS instance runs RDS High-availability Edition and uses a new general-purpose instance type, you can create read-only RDS instances with the new general-purpose instance types for the primary RDS instance. For more information, see Primary ApsaraDB RDS for PostgreSQL instance types.
Database engine version Instance family Instance type CPU and memory specifications Maximum number of connections Maximum IOPS Storage capacity
PostgreSQL 14 PostgreSQL 13, PostgreSQL12, PostgreSQL11, and PostgreSQL 10 General-purpose instance family pgro.n4.2c.1m 2 cores, 8 GB 800 For more information, see Maximum IOPS for standard SSDs and ESSDs. 20 GB to 32,000 GB
pgro.n4.4c.1m 4 cores, 16 GB 1,600
pgro.n4.6c.1m 6 cores, 24 GB 2,400
pgro.n4.8c.1m 8 cores, 32 GB 3,200
pgro.n4.12c.1m 12 cores, 48 GB 4,600