This topic provides an overview of instance types for read-only ApsaraDB RDS for PostgreSQL instances. This overview includes the most recent instance types and the specifications for each instance type.
Note The subscription and pay-as-you-go billing methods are supported for read-only RDS instances. For more information, see Pricing. The prices displayed on the ApsaraDB RDS buy page prevail.
Instance specifications
Instance types for standard RDS instances
Note If an RDS instance uses clouds disks and a dedicated instance type, the maximum IOPS of the instance is calculated by using the following formula: Actual maximum IOPS = min{Maximum IOPS, IOPS that corresponds to the maximum I/O bandwidth, Cloud disk IOPS}.
The size of an I/O operation in ApsaraDB RDS for PostgreSQL is 8 KB. IOPS that corresponds to the maximum I/O bandwidth is calculated by using the following formula: IOPS that corresponds to the maximum I/O bandwidth = Maximum I/O bandwidth in MB/s × 1024/8.
For more information about how to calculate the cloud disk IOPS, see IOPS.
The maximum IOPS and maximum I/O bandwidth cannot be guaranteed for RDS instances that use cloud disks and general-purpose instance types.
General-purpose instance types
Instance type | Number of CPU cores and memory capacity | Maximum number of connections | Maximum IOPS | Maximum I/O bandwidth (Unit: MB/s) | Storage capacity |
pgro.n2.2c.1m | 2 cores, 4 GB | 400 | The maximum IOPS and maximum I/O bandwidth cannot be guaranteed. For more information, see Read-only ApsaraDB RDS instance types. | PL1 ESSD: 20 GB to 64,000 GB PL2 ESSD: 500 GB to 64,000 GB PL3 ESSD: 1,500 GB to 64,000 GB General ESSD: 10 GB to 64,000 GB
|
pgro.n2.4c.1m | 4 cores, 8 GB | 800 |
pgro.n2.8c.1m | 8 cores, 16 GB | 1,600 |
pgro.n4.2c.1m | 2 cores, 8 GB | 800 |
pgro.n4.4c.1m | 4 cores, 16 GB | 1,600 |
pgro.n4.8c.1m | 8 cores, 32 GB | 3,200 |
Dedicated instance types
Instance type | Number of CPU cores and memory capacity | Maximum number of connections | Maximum IOPS | Maximum I/O bandwidth (Unit: MB/s) | Storage capacity |
pgro.x2.medium.1c | 2 cores, 4 GB | 400 | 10,000 | 128 | PL1 ESSD: 20 GB to 64,000 GB PL2 ESSD: 500 GB to 64,000 GB PL3 ESSD: 1,500 GB to 64,000 GB General ESSD: 10 GB to 64,000 GB
|
pgro.x2.large.1c | 4 cores, 8 GB | 800 | 20,000 | 192 |
pgro.x2.xlarge.1c | 8 cores, 16 GB | 1,600 | 25,000 | 256 |
pgro.x2.3large.1c | 12 cores, 24 GB | 2,400 | 30,000 | 320 |
pgro.x2.2xlarge.1c | 16 cores, 32 GB | 3,200 | 40,000 | 384 |
pgro.x2.3xlarge.1c | 24 cores, 48 GB | 4,800 | 50,000 | 512 |
pgro.x2.4xlarge.1c | 32 cores, 64 GB | 6,400 | 60,000 | 640 |
pgro.x2.13large.1c | 52 cores, 96 GB | 9,600 | 100,000 | 1,024 |
pgro.x2.8xlarge.1c | 64 cores, 128 GB | 12,800 | 120,000 | 1,280 |
pgro.x2.13xlarge.1c | 104 cores, 192 GB | 19,200 | 200,000 | 2,048 |
pgro.x4.medium.1c | 2 cores, 8 GB | 800 | 10,000 | 128 |
pgro.x4.large.1c | 4 cores, 16 GB | 1,600 | 20,000 | 192 |
pgro.x4.xlarge.1c | 8 cores, 32 GB | 3,200 | 25,000 | 256 |
pgro.x4.3large.1c | 12 cores, 48 GB | 4,800 | 30,000 | 320 |
pgro.x4.2xlarge.1c | 16 cores, 64 GB | 6,400 | 40,000 | 384 |
pgro.x4.3xlarge.1c | 24 cores, 96 GB | 9,600 | 50,000 | 512 |
pgro.x4.4xlarge.1c | 32 cores, 128 GB | 12,800 | 60,000 | 640 |
pgro.x4.13large.1c | 52 cores, 192 GB | 19,200 | 100,000 | 1,024 |
pgro.x4.8xlarge.1c | 64 cores, 256 GB | 25,600 | 120,000 | 1,280 |
pgro.x4.13xlarge.1c | 104 cores, 384 GB | 38,400 | 200,000 | 2,048 |
pgro.x8.medium.1c | 2 cores, 16 GB | 1,600 | 10,000 | 128 |
pgro.x8.large.1c | 4 cores, 32 GB | 3,200 | 20,000 | 192 |
pgro.x8.xlarge.1c | 8 cores, 64 GB | 6,400 | 25,000 | 256 |
pgro.x8.3large.1c | 12 cores, 96 GB | 9,600 | 30,000 | 320 |
pgro.x8.2xlarge.1c | 16 cores, 128 GB | 12,800 | 40,000 | 384 |
pgro.x8.3xlarge.1c | 24 cores, 192 GB | 19,200 | 50,000 | 512 |
pgro.x8.4xlarge.1c | 32 cores, 256 GB | 25,600 | 60,000 | 640 |
pgro.x8.13large.1c | 52 cores, 384 GB | 38,400 | 100,000 | 1,024 |
pgro.x8.8xlarge.1c | 64 cores, 512 GB | 51,200 | 120,000 | 1,280 |
pgro.x8.13xlarge.1c | 104 cores, 768 GB | 76,800 | 200,000 | 2,048 |
Instance types for YiTian RDS instances
General-purpose instance types
Instance type | Number of CPU cores and memory capacity | Maximum number of connections | Maximum IOPS | Maximum I/O bandwidth (Unit: MB/s) | Storage capacity |
pgro.n2m.2c.1m | 2 cores, 4 GB | 400 | The maximum IOPS and maximum I/O bandwidth cannot be guaranteed. For more information, see Read-only ApsaraDB RDS instance types. | PL1 ESSD: 20 GB to 64,000 GB PL2 ESSD: 500 GB to 64,000 GB PL3 ESSD: 1,500 GB to 64,000 GB General ESSD: 10 GB to 64,000 GB
|
pgro.n2m.4c.1m | 4 cores, 8 GB | 800 |
pgro.n2m.8c.1m | 8 cores, 16 GB | 1,600 |
pgro.n4m.2c.1m | 2 cores, 8 GB | 800 |
pgro.n4m.4c.1m | 4 cores, 16 GB | 1,600 |
pgro.n4m.8c.1m | 8 cores, 32 GB | 3,200 |
Dedicated instance types
Instance type | Number of CPU cores and memory capacity | Maximum number of connections | Maximum IOPS | Maximum I/O bandwidth (Unit: MB/s) | Storage capacity |
pgro.x2m.medium.1c | 2 cores, 4 GB | 400 | 20,000 | 192 | PL1 ESSD: 20 GB to 64,000 GB PL2 ESSD: 500 GB to 64,000 GB PL3 ESSD: 1,500 GB to 64,000 GB General ESSD: 10 GB to 64,000 GB
|
pgro.x2m.large.1c | 4 cores, 8 GB | 800 | 40,000 | 256 |
pgro.x2m.xlarge.1c | 8 cores, 16 GB | 1,600 | 50,000 | 384 |
pgro.x2m.2xlarge.1c | 16 cores, 32 GB | 3,200 | 80,000 | 640 |
pgro.x2m.4xlarge.1c | 32 cores, 64 GB | 6,400 | 125,000 | 1,024 |
pgro.x2m.8xlarge.1c | 64 cores, 128 GB | 12,800 | 250,000 | 2,048 |
pgro.x4m.medium.1c | 2 cores, 8 GB | 800 | 20,000 | 192 |
pgro.x4m.large.1c | 4 cores, 16 GB | 1,600 | 40,000 | 256 |
pgro.x4m.xlarge.1c | 8 cores, 32 GB | 3,200 | 50,000 | 384 |
pgro.x4m.2xlarge.1c | 16 cores, 64 GB | 6,400 | 80,000 | 640 |
pgro.x4m.4xlarge.1c | 32 cores, 128 GB | 12,800 | 125,000 | 1,024 |
pgro.x4m.8xlarge.1c | 64 cores, 256 GB | 25,600 | 250,000 | 2,048 |
pgro.x8m.medium.1c | 2 cores, 16 GB | 1,600 | 20,000 | 192 |
pgro.x8m.large.1c | 4 cores, 32 GB | 3,200 | 40,000 | 256 |
pgro.x8m.xlarge.1c | 8 cores, 64 GB | 6,400 | 50,000 | 384 |
pgro.x8m.2xlarge.1c | 16 cores, 128 GB | 12,800 | 80,000 | 640 |
pgro.x8m.4xlarge.1c | 32 cores, 256 GB | 25,600 | 125,000 | 1,024 |
pgro.x8m.8xlarge.1c | 64 cores, 512 GB | 51,200 | 250,000 | 2,048 |
Phase-out instance types
The following table describes the phase-out instance types of read-only RDS instances. The phase-out instance types are no longer available to new read-only RDS instances. We recommend that you select available instance types for new read-only RDS instances.
Phase-out instance types
Instance type | CPU | Memory capacity | Maximum number of connections | Maximum IOPS |
pgro.n2.small.1c | 1 core | 2 GB | 200 | For more information, see IOPS. |
pgro.n2.medium.1c | 2 cores | 4 GB | 400 |
pg.x8.xlarge.2 | 8 cores | 64 GB | 10,000 | 18,000 |
pg.x8.2xlarge.2 | 16 cores | 128 GB | 12,000 | 36,000 |
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 |
rds.pg.st.h43 | 60 cores | 470 GB | 4,000 | 50,000 |