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.

Read-only ApsaraDB RDS for PostgreSQL instances with local SSDs

Role Database engine version Instance family Instance type CPU and memory specifications Maximum number of connections Maximum IOPS Storage capacity
Read-only instance

10

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

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

Role Database engine version Instance family Instance type CPU and memory specifications Maximum number of connections Maximum IOPS Storage capacity
Read-only instance

PostgreSQL 13, PostgreSQL12, PostgreSQL11, and PostgreSQL 10

General-purpose instance family pgro.n2.small.1c 1 core, 2 GB 200 For more information, see Maximum IOPS for standard SSDs and ESSDs. 50GB-32000GB
pgro.n2.medium.1c 2 cores, 4 GB 400
Dedicated instance family pgro.x2.medium.1c 2 cores, 4 GB 400
pgro.x2.large.1c 4 cores, 8 GB 800
pgro.x2.xlarge.1c 8 cores, 16 GB 1600
pgro.x2.3large.1c 12 cores, 24 GB 2400
pgro.x2.2xlarge.1c 16 cores, 32 GB 3200
pgro.x2.3xlarge.1c 24 cores, 48 GB 4800
pgro.x2.4xlarge.1c 32 cores, 64 GB 6400
pgro.x2.13large.1c 52 cores, 104 GB 10400
pgro.x2.8xlarge.1c 64 cores, 128 GB 12800
pgro.x2.13xlarge.1c 104 cores, 192 GB 19200
pgro.x4.medium.1c 2 cores, 8 GB 800
pgro.x4.large.1c 4 cores, 16 GB 1600
pgro.x4.xlarge.1c 8 cores, 32 GB 3200
pgro.x4.3large.1c 12 cores, 48 GB 4800
pgro.x4.2xlarge.1c 16 cores, 64 GB 6400
pgro.x4.3xlarge.1c 24 cores, 96 GB 9600
pgro.x4.4xlarge.1c 32 cores, 128 GB 12800
pgro.x4.13large.1c 52 cores, 192 GB 19200
pgro.x4.8xlarge.1c 64 cores, 256 GB 25600
pgro.x4.13xlarge.1c 104 cores, 384 GB 38400
pgro.x8.medium.1c 2 cores, 16 GB 1600
pgro.x8.large.1c 4 cores, 32 GB 3200
pgro.x8.xlarge.1c 8 cores, 64 GB 6400
pgro.x8.3large.1c 12 cores, 96 GB 9600
pgro.x8.2xlarge.1c 16 cores, 128 GB 12800
pgro.x8.3xlarge.1c 24 cores, 192 GB 19200
pgro.x8.4xlarge.1c 32 cores, 256 GB 25600
pgro.x8.13large.1c 52 cores, 384 GB 38400
pgro.x8.8xlarge.1c 64 cores, 512 GB 51200
pgro.x8.13xlarge.1c 104 cores, 768 GB 76800