This topic provides an overview of primary 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 memory capacity that is supported by an instance type includes the memory that is occupied by the RDS-related management services, the database service, and the underlying operating system. For example, the memory capacity includes the memory reserved for BIOS, the memory occupied by the kernel of the operating system, and the memory occupied by the hypervisor. Therefore, the available memory that you can view may be less than the memory capacity that is supported by the instance type.

Primary ApsaraDB RDS for PostgreSQL instances (with local SSDs)

RDS edition PostgreSQL version Instance family Instance type CPU and memory specifications Maximum number of connections Maximum IOPS Storage capacity
High-availability Edition

9.4 and 10

General-purpose instance rds.pg.s1.small 1 CPU core, 2 GB 200 1,000 20 GB to 6,000 GB
rds.pg.s2.large 2 CPU cores, 4 GB 400 2,000
rds.pg.s3.large 4 CPU cores, 8 GB 800 5,000
rds.pg.c1.large 8 CPU cores, 16 GB 1,500 8,000
rds.pg.c1.xlarge 8 CPU cores, 32 GB 2,000 12,000
rds.pg.c2.xlarge 16 CPU cores, 64 GB 3,000 16,000
Dedicated instance (with a large memory capacity) pg.x8.medium.2 2 CPU cores, 16 GB 2,500 4,500
pg.x8.large.2 4 CPU cores, 32 GB 5,000 9,000
pg.x8.xlarge.2 8 CPU cores, 64 GB 10,000 18,000
pg.x8.2xlarge.2 16 CPU cores, 128 GB 12,000 36,000
Dedicated host instance rds.pg.st.h43 60 CPU cores, 470 GB 12,000 450,000

Primary ApsaraDB RDS for PostgreSQL instances (with standard or enhanced SSDs)

RDS edition PostgreSQL version Instance family Instance type CPU and memory specifications Maximum number of connections Maximum IOPS Storage capacity
Basic Edition 10, 11, and 12 General-purpose instance pg.n2.small.1 1 CPU core, 2 GB 200 For more information, see the "IOPS" section in Primary instance types.

Standard SSD: 20 GB to 6,000 GB

ESSD PL1: 50 GB to 32,000 GB

pg.n2.medium.1 2 CPU cores, 4 GB 400
pg.n4.medium.1 2 CPU cores, 8 GB 800
pg.n2.large.1 4 CPU cores, 8 GB 800
pg.n4.large.1 4 CPU cores, 16 GB 1,600
pg.n2.xlarge.1 8 CPU cores, 16 GB 1,600
pg.n4.xlarge.1 8 CPU cores, 32 GB 3,200
pg.n2.2xlarge.1 16 CPU cores, 32 GB 3,200
pg.n4.2xlarge.1 16 CPU cores, 64 GB 6,400
pg.n8.2xlarge.1 16 CPU cores, 128 GB 10,000
pg.n4.4xlarge.1 32 CPU cores, 128 GB 12,800
pg.n8.4xlarge.1 32 CPU cores, 256 GB 20,000
pg.n4.8xlarge.1 56 CPU cores, 224 GB 22,000
pg.n8.8xlarge.1 56 CPU cores, 480 GB 48,000
High-availability Edition

10, 11, and 12

General-purpose instance pg.n2.small.2c 1 CPU core, 2 GB 200 For more information, see the "IOPS" section in Primary instance types.

Standard SSD: 20 GB to 6,000 GB

Fully encrypted standard SSD: 50 GB to 6,000GB

ESSD PL1: 50 GB to 32,000 GB

ESSD PL2: 500 GB to 32,000 GB

ESSD PL3: 1,500 GB to 32,000 GB

pg.n2.medium.2c 2 CPU core, 4 GB 400
Dedicated instance pg.x2.medium.2c 2 CPU cores, 4 GB 400
pg.x4.medium.2c 2 CPU cores, 8 GB 800
pg.x8.medium.2c 2 CPU cores, 16 GB 1,600
pg.x2.large.2c 4 CPU cores, 8 GB 800
pg.x4.large.2c 4 CPU cores, 16 GB 1,600
pg.x8.large.2c 4 CPU cores, 32 GB 3,200
pg.x2.xlarge.2c 8 CPU cores, 16 GB 1,600
pg.x4.xlarge.2c 8 CPU cores, 32 GB 3,200
pg.x8.xlarge.2c 8 CPU cores, 64 GB 6,400
pg.x2.3large.2c 12 CPU cores, 24 GB 2,400
pg.x4.3large.2c 12 CPU cores, 48 GB 4,800
pg.x8.3large.2c 12 CPU cores, 96 GB 9,600
pg.x2.2xlarge.2c 16 CPU cores, 32 GB 3,200
pg.x4.2xlarge.2c 16 CPU cores, 64 GB 6,400
pg.x8.2xlarge.2c 16 CPU cores, 128 GB 12,800
pg.x2.3xlarge2c 24 CPU cores, 48 GB 4,800
pg.x4.3xlarge.2c 24 CPU cores, 96 GB 9,600
pg.x8.3xlarge.2c 24 CPU cores, 192 GB 19,200
pg.x2.4xlarge.2c 32 CPU cores, 64 GB 6,400
pg.x4.4xlarge.2c 32 CPU cores, 128 GB 12,800
pg.x8.4xlarge.2c 32 CPU cores, 256 GB 25,600
pg.x2.13large.2c 52 CPU cores, 104 GB 10,400
pg.x4.13large.2c 52 CPU cores, 192 GB 19,200
pg.x8.13large.2c 52 CPU cores, 384 GB 38,400
pg.x2.8xlarge.2c 64 CPU cores, 128 GB 12,800
pg.x4.8xlarge.2c 64 CPU cores, 256 GB 25,600
pg.x8.8xlarge.2c 64 CPU cores, 512 GB 51,200
pg.x2.13xlarge.2c 104 CPU cores, 192 GB 19,200
pg.x4.13xlarge.2c 104 CPU cores, 384 GB 38,400
pg.x8.13xlarge.2c 104 CPU cores, 768 GB 76,800

Phased-out instance types of ApsaraDB RDS for PostgreSQL

The following table describes the phased-out instance types of ApsaraDB RDS for PostgreSQL. These instance types are no longer available to new instances.

Instance type CPU cores Memory capacity Maximum connections Maximum IOPS
rds.pg.t1.small 1 1GB 100 600
pg.x8.4xlarge.2 32 256GB 20000 50000
pg.n1.micro.1 1 1GB 100 See Maximum IOPS for standard SSDs and ESSDs.
pg.gn5i-c2g1.large.1 2 8 GB 800
pg.gn5i-c4g1.xlarge.1 4 16 GB 1,600
pg.gn5i-c8g1.2xlarge.1 8 32 GB 3,200
pg.gn5i-c16g1.4xlarge.1 16 64 GB 6,400
pg.gn5i-c16g1.8xlarge.1 32 128 GB 12,800
pg.gn5i-c28g1.14xlarge.1 56 224 GB 22,000