This topic describes the read-only instance types for ApsaraDB RDS for PostgreSQL and their configurations.
Note ApsaraDB RDS for PostgreSQL read-only instances support two billing methods: subscription and pay-as-you-go. For more information, see Read-only instance pricing. The prices that are displayed on the purchase page are final.
Specifications checklist
Important For more information about the differences between Standard Edition and Yitian Edition, see Product types.
Actual maximum IOPS: This value is affected by the storage class, storage capacity, and instance type. For more information, see Maximum IOPS formula.
Actual maximum throughput: This value is affected by the storage class, storage capacity, and instance type. For more information, see Maximum throughput formula.
Basic series instance types
Standard Edition instance types
General-purpose
Instance type code | CPU and memory | Maximum connections | Maximum IOPS | Maximum I/O bandwidth (MB/s) | Storage space |
pgro.n2.2c.1m | 2 cores, 4 GB | 400 | The maximum IOPS and maximum I/O bandwidth cannot be guaranteed. If your business is sensitive to IOPS, select a Dedicated instance type. | PL1 ESSD: 20 GB to 64000 GB PL2 ESSD: 500 GB to 64000 GB PL3 ESSD: 1500 GB to 64000 GB Premium performance disk: 10 GB to 64000 GB
|
pgro.n4.2c.1m | 2 cores, 8 GB | 800 |
pgro.n2.4c.1m | 4 cores, 8 GB | 800 |
pgro.n4.4c.1m | 4 cores, 16 GB | 1600 |
pgro.n2.8c.1m | 8 cores, 16 GB | 1600 |
pgro.n4.8c.1m | 8 cores, 32 GB | 3200 |
Dedicated
Note Due to product optimization and resource planning adjustments, some instance types will be discontinued. For details, see [Discontinued] Some ApsaraDB RDS for PostgreSQL instance types will stop being sold starting February 28, 2026.
Instance type code | CPU and memory | Maximum connections | Maximum IOPS | Maximum I/O bandwidth (MB/s) | Storage space |
pgro.x2.medium.1c | 2 cores, 4 GB | 400 | 10000 | 128 | PL1 ESSD: 20 GB to 64000 GB PL2 ESSD: 500 GB to 64000 GB PL3 ESSD: 1500 GB to 64000 GB Premium performance disk: 10 GB to 64000 GB
|
pgro.x4.medium.1c | 2 cores, 8 GB | 800 | 10000 | 128 |
pgro.x8.medium.1c | 2 cores, 16 GB | 1600 | 10000 | 128 |
pgro.x2.large.1c | 4 cores, 8 GB | 800 | 20000 | 192 |
pgro.x4.large.1c | 4 cores, 16 GB | 1600 | 20000 | 192 |
pgro.x8.large.1c | 4 cores, 32 GB | 3200 | 20000 | 192 |
pgro.x2.xlarge.1c | 8 cores, 16 GB | 1600 | 25000 | 256 |
pgro.x4.xlarge.1c | 8 cores, 32 GB | 3200 | 25000 | 256 |
pgro.x8.xlarge.1c | 8 cores, 64 GB | 6400 | 25000 | 256 |
pgro.x2.3large.1c | 12 cores, 24 GB | 2400 | 30000 | 320 |
pgro.x4.3large.1c | 12 cores, 48 GB | 4800 | 30000 | 320 |
pgro.x8.3large.1c | 12 cores, 96 GB | 9600 | 30000 | 320 |
pgro.x2.2xlarge.1c | 16 cores, 32 GB | 3200 | 40000 | 384 |
pgro.x4.2xlarge.1c | 16 cores, 64 GB | 6400 | 40000 | 384 |
pgro.x8.2xlarge.1c | 16 cores, 128 GB | 12800 | 40000 | 384 |
pgro.x2.3xlarge.1c | 24 cores, 48 GB | 4800 | 50000 | 512 |
pgro.x4.3xlarge.1c | 24 cores, 96 GB | 9600 | 50000 | 512 |
pgro.x8.3xlarge.1c | 24 cores, 192 GB | 19200 | 50000 | 512 |
pgro.x2.4xlarge.1c | 32 cores, 64 GB | 6400 | 60000 | 640 |
pgro.x4.4xlarge.1c | 32 cores, 128 GB | 12800 | 60000 | 640 |
pgro.x8.4xlarge.1c | 32 cores, 256 GB | 25600 | 60000 | 640 |
pgro.x2.13large.1c | 52 cores, 96 GB | 9600 | 100000 | 1024 |
pgro.x4.13large.1c | 52 cores, 192 GB | 19200 | 100000 | 1024 |
pgro.x8.13large.1c | 52 cores, 384 GB | 38400 | 100000 | 1024 |
pgro.x2.8xlarge.1c | 64 cores, 128 GB | 12800 | 120000 | 1280 |
pgro.x4.8xlarge.1c | 64 cores, 256 GB | 25600 | 120000 | 1280 |
pgro.x8.8xlarge.1c | 64 cores, 512 GB | 51200 | 120000 | 1280 |
pgro.x2.12xlarge.1c | 96 cores, 192 GB | 19200 | 240000 | 2048 |
pgro.x4.12xlarge.1c | 96 cores, 384 GB | 38400 | 240000 | 2048 |
pgro.x8.12xlarge.1c | 96 cores, 768 GB | 76800 | 240000 | 2048 |
pgro.x2.13xlarge.1c | 104 cores, 192 GB | 19200 | 200000 | 2048 |
pgro.x4.13xlarge.1c | 104 cores, 384 GB | 38400 | 200000 | 2048 |
pgro.x8.13xlarge.1c | 104 cores, 768 GB | 76800 | 200000 | 2048 |
pgro.x2.16xlarge.1c | 128 cores, 256 GB | 25600 | 320000 | 2560 |
pgro.x4.16xlarge.1c | 128 cores, 512 GB | 51200 | 320000 | 2560 |
pgro.x8.16xlarge.1c | 128 cores, 1024 GB | 102400 | 320000 | 2560 |
pgro.x2.24xlarge.1c | 192 cores, 384 GB | 38400 | 500000 | 4096 |
pgro.x4.24xlarge.1c | 192 cores, 768 GB | 76800 | 500000 | 4096 |
pgro.x8.24xlarge.1c | 192 cores, 1536 GB | 153600 | 500000 | 4096 |
Yitian Edition instance types
General-purpose
Instance Type | CPU and memory | Maximum connections | Maximum IOPS | Maximum I/O bandwidth (MB/s) | Storage space |
pgro.n2m.2c.1m | 2 cores, 4 GB | 400 | The maximum IOPS and maximum I/O bandwidth cannot be guaranteed. If your business is sensitive to IOPS, select a Dedicated instance type. | PL1 ESSD: 20 GB to 64000 GB PL2 ESSD: 500 GB to 64000 GB PL3 ESSD: 1500 GB to 64000 GB Premium performance disk: 10 GB to 64000 GB
|
pgro.n2m.4c.1m | 4 cores, 8 GB | 800 |
pgro.n2m.8c.1m | 8 cores, 16 GB | 1600 |
pgro.n4m.2c.1m | 2 cores, 8 GB | 800 |
pgro.n4m.4c.1m | 4 cores, 16 GB | 1600 |
pgro.n4m.8c.1m | 8 cores, 32 GB | 3200 |
Dedicated
Instance type code | CPU and memory | Maximum connections | Maximum IOPS | Maximum I/O bandwidth (MB/s) | Storage space |
pgro.x2m.medium.1c | 2 cores, 4 GB | 400 | 20000 | 192 | PL1 ESSD: 20 GB to 64000 GB PL2 ESSD: 500 GB to 64000 GB PL3 ESSD: 1500 GB to 64000 GB Premium performance disk: 10 GB to 64000 GB
|
pgro.x2m.large.1c | 4 cores, 8 GB | 800 | 40000 | 256 |
pgro.x2m.xlarge.1c | 8 cores, 16 GB | 1600 | 50000 | 384 |
pgro.x2m.2xlarge.1c | 16 cores, 32 GB | 3200 | 80000 | 640 |
pgro.x2m.4xlarge.1c | 32 cores, 64 GB | 6400 | 125000 | 1024 |
pgro.x2m.8xlarge.1c | 64 cores, 128 GB | 12800 | 250000 | 2048 |
pgro.x4m.medium.1c | 2 cores, 8 GB | 800 | 20000 | 192 |
pgro.x4m.large.1c | 4 cores, 16 GB | 1600 | 40000 | 256 |
pgro.x4m.xlarge.1c | 8 cores, 32 GB | 3200 | 50000 | 384 |
pgro.x4m.2xlarge.1c | 16 cores, 64 GB | 6400 | 80000 | 640 |
pgro.x4m.4xlarge.1c | 32 cores, 128 GB | 12800 | 125000 | 1024 |
pgro.x4m.8xlarge.1c | 64 cores, 256 GB | 25600 | 250000 | 2048 |
pgro.x8m.medium.1c | 2 cores, 16 GB | 1600 | 20000 | 192 |
pgro.x8m.large.1c | 4 cores, 32 GB | 3200 | 40000 | 256 |
pgro.x8m.xlarge.1c | 8 cores, 64 GB | 6400 | 50000 | 384 |
pgro.x8m.2xlarge.1c | 16 cores, 128 GB | 12800 | 80000 | 640 |
pgro.x8m.4xlarge.1c | 32 cores, 256 GB | 25600 | 125000 | 1024 |
pgro.x8m.8xlarge.1c | 64 cores, 512 GB | 51200 | 250000 | 2048 |
Legacy ApsaraDB RDS for PostgreSQL read-only instance types
The following table lists the legacy read-only instance types for ApsaraDB RDS for PostgreSQL. You can no longer create instances of these types. We recommend that you use the latest instance types.
Specification history
Specification Code | CPU | Memory | Maximum connections | Maximum IOPS |
pgro.n2.small.1c | 1 core | 2 GB | 200 | See List of read-only instance types |
pgro.n2.medium.1c | 2 cores | 4 GB | 400 |
pg.x8.xlarge.2 | 8 cores | 64 GB | 10000 | 18000 |
pg.x8.2xlarge.2 | 16 cores | 128 GB | 12000 | 36000 |
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 |
rds.pg.st.h43 | 60 cores | 470 GB | 4000 | 50000 |