This topic provides an overview of primary ApsaraDB RDS for PostgreSQL instance types. The overview includes the most recent instance types, the earlier instance types, and the specifications for each instance type.
Note
For RDS instances that use standard SSDs or ESSDs, the memory includes the memory
that is occupied by the underlying operating system and the memory that is occupied
by the RDS-related management services. Therefore, the available memory of an RDS
instance may be less than the memory capacity that is supported by the instance type.
- The underlying operating system occupies 500 MB to 700 MB of memory.
- The RDS-related management services occupy approximately 500 MB of memory.
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 |
|---|---|---|---|---|---|---|---|
| RDS High-availability Edition |
9.4 and 10 |
General-purpose instance | rds.pg.s2.large | 2 cores, 4 GB | Unlimited | For more information, see the "IOPS" section in Primary instance types. | 20 GB to 6,000 GB |
| rds.pg.s3.large | 4 cores, 8 GB | ||||||
| rds.pg.c1.large | 8 cores, 16 GB | ||||||
| rds.pg.c1.xlarge | 8 cores, 32 GB | ||||||
| rds.pg.c2.xlarge | 16 cores, 64 GB | ||||||
| rds.pg.c2.2xlarge | 16 cores, 128 GB | ||||||
| Dedicated instance (with a large memory capacity) | pg.x8.medium.2 | 2 cores, 16 GB | 2,500 | 4,500 | |||
| pg.x8.large.2 | 4 cores, 32 GB | 5,000 | 9,000 | ||||
| pg.x8.xlarge.2 | 8 cores, 64 GB | 10,000 | 18,000 | ||||
| pg.x8.2xlarge.2 | 16 cores, 128 GB | 20,000 | 36,000 | ||||
| Dedicated host instance | rds.pg.st.h43 | 60 cores, 470 GB | 64,000 | 50,000 |
Primary ApsaraDB RDS for PostgreSQL instances with standard SSDs or ESSDs
| RDS edition | PostgreSQL version | Instance family | Instance type | CPU and memory specifications | Maximum number of connections | Maximum IOPS | Storage capacity |
|---|---|---|---|---|---|---|---|
| RDS Basic Edition | 10, 11, 12, 13, and 14 | General-purpose instance | pg.n2.small.1 | 1 core, 2 GB | 200 | For more information, see the "IOPS" section in Primary instance types. |
Standard SSD: 20 GB to 6,000 GB Enhanced SSD (ESSD) of PL1: 20 GB to 32,000 GB ESSD of PL2: 500 GB to 32,000 GB ESSD of PL3: 1,500 GB to 32,000 GB |
| pg.n2.medium.1 | 2 cores, 4 GB | 400 | |||||
| pg.n4.medium.1 | 2 cores, 8 GB | 800 | |||||
| pg.n2.large.1 | 4 cores, 8 GB | 800 | |||||
| pg.n4.large.1 | 4 cores, 16 GB | 1,600 | |||||
| pg.n2.xlarge.1 | 8 cores, 16 GB | 1,600 | |||||
| pg.n4.xlarge.1 | 8 cores, 32 GB | 3,200 | |||||
| pg.n2.2xlarge.1 | 16 cores, 32 GB | 3,200 | |||||
| pg.n4.2xlarge.1 | 16 cores, 64 GB | 6,400 | |||||
| pg.n8.2xlarge.1 | 16 cores, 128 GB | 10,000 | |||||
| pg.n4.4xlarge.1 | 32 cores, 128 GB | 12,800 | |||||
| pg.n8.4xlarge.1 | 32 cores, 256 GB | 20,000 | |||||
| pg.n4.8xlarge.1 | 64 cores, 256 GB | 22,000 | |||||
| pg.n8.8xlarge.1 | 64 cores, 512 GB | 48,000 | |||||
| RDS High-availability Edition |
10, 11, 12, 13, and 14 |
Dedicated instance | pg.x2.medium.2c | 2 cores, 4 GB | 400 | For more information, see the "IOPS" section in Primary instance types. |
Standard SSD: 20 GB to 6,000 GB ESSD of PL1: 20 GB to 32,000 GB ESSD of PL2: 500 GB to 32,000 GB ESSD of PL3: 1,500 GB to 32,000 GB |
| pg.x4.medium.2c | 2 cores, 8 GB | 800 | |||||
| pg.x8.medium.2c | 2 cores, 16 GB | 1,600 | |||||
| pg.x2.large.2c | 4 cores, 8 GB | 800 | |||||
| pg.x4.large.2c | 4 cores, 16 GB | 1,600 | |||||
| pg.x8.large.2c | 4 cores, 32 GB | 3,200 | |||||
| pg.x2.xlarge.2c | 8 cores, 16 GB | 1,600 | |||||
| pg.x4.xlarge.2c | 8 cores, 32 GB | 3,200 | |||||
| pg.x8.xlarge.2c | 8 cores, 64 GB | 6,400 | |||||
| pg.x2.3large.2c | 12 cores, 24 GB | 2,400 | |||||
| pg.x4.3large.2c | 12 cores, 48 GB | 4,800 | |||||
| pg.x8.3large.2c | 12 cores, 96 GB | 9,600 | |||||
| pg.x2.2xlarge.2c | 16 cores, 32 GB | 3,200 | |||||
| pg.x4.2xlarge.2c | 16 cores, 64 GB | 6,400 | |||||
| pg.x8.2xlarge.2c | 16 cores, 128 GB | 12,800 | |||||
| pg.x2.3xlarge2c | 24 cores, 48 GB | 4,800 | |||||
| pg.x4.3xlarge.2c | 24 cores, 96 GB | 9,600 | |||||
| pg.x8.3xlarge.2c | 24 cores, 192 GB | 19,200 | |||||
| pg.x2.4xlarge.2c | 32 cores, 64 GB | 6,400 | |||||
| pg.x4.4xlarge.2c | 32 cores, 128 GB | 12,800 | |||||
| pg.x8.4xlarge.2c | 32 cores, 256 GB | 25,600 | |||||
| pg.x2.13large.2c | 52 cores, 96 GB | 9,600 | |||||
| pg.x4.13large.2c | 52 cores, 192 GB | 19,200 | |||||
| pg.x8.13large.2c | 52 cores, 384 GB | 38,400 | |||||
| pg.x2.8xlarge.2c | 64 cores, 128 GB | 12,800 | |||||
| pg.x4.8xlarge.2c | 64 cores, 256 GB | 25,600 | |||||
| pg.x8.8xlarge.2c | 64 cores, 512 GB | 51,200 | |||||
| pg.x2.13xlarge.2c | 104 cores, 192 GB | 19,200 | |||||
| pg.x4.13xlarge.2c | 104 cores, 384 GB | 38,400 | |||||
| pg.x8.13xlarge.2c | 104 cores, 768 GB | 76,800 |
Primary ApsaraDB RDS for PostgreSQL instances with new general-purpose instance types
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.
Note The new general-purpose instance types do not support the features that are described
in the following topics:
- Migrate the data of a self-managed PostgreSQL instance to an ApsaraDB RDS for PostgreSQL instance
- Configure disk encryption for an ApsaraDB RDS for PostgreSQL instance
- Connect an ApsaraDB RDS for PostgreSQL instance to a self-managed AD domain
- Upgrade an ApsaraDB RDS for PostgreSQL instance from Basic Edition to High-availability Edition
- Use the cross-region backup feature for an ApsaraDB RDS for PostgreSQL instance
Before you can select a new general-purpose instance type for an RDS instance, make
sure that the RDS instance meets the following requirements:
- The RDS instance runs PostgreSQL 10, PostgreSQL 11, PostgreSQL 12, PostgreSQL 13, or PostgreSQL 14.
- The RDS instance uses ESSDs of PL1, ESSDs of PL2, or ESSDs of PL3.
- The new general-purpose instance types are available in the following Alibaba Cloud regions: Singapore (Singapore), China (Hangzhou), China (Beijing), China (Shanghai), China (Shenzhen), and China (Hong Kong). The new general-purpose instance types are to be released in the other Alibaba Cloud regions soon. If you want to create an RDS instance that uses a new general-purpose instance type, go to the ApsaraDB RDS console.
- If an RDS instance uses a new general-purpose instance type, you can change the instance type of the RDS instance only to a different new general-purpose instance type.
- If you want to create an RDS instance that uses a new general-purpose instance type, make sure that the AliyunServiceRoleForRdsPgsqlOnEcs role are assumed by ApsaraDB RDS for PostgreSQL. For more information, see Service-linked roles.
| RDS edition | Instance type | CPU and memory specifications | Maximum number of connections | Maximum IOPS | Storage capacity |
|---|---|---|---|---|---|
| RDS Basic Edition | pg.n2.2c.1m | 2 cores, 4 GB | 400 | For more information, see the "IOPS" section in Primary instance types. |
ESSD of PL1: 20 GB to 32,000 GB ESSD of PL2: 500 GB to 32,000 GB ESSD of PL3: 1,500 GB to 32,000 GB |
| pg.n4.2c.1m | 2 cores, 8 GB | 800 | |||
| pg.n2.4c.1m | 4 cores, 8 GB | 800 | |||
| pg.n4.4c.1m | 4 cores, 16 GB | 1,600 | |||
| pg.n4.6c.1m | 6 cores, 24 GB | 2,400 | |||
| pg.n4.8c.1m | 8 cores, 32 GB | 3,200 | |||
| RDS High-availability Edition | pg.n2.2c.2m | 2 cores, 4 GB | 400 | For more information, see the "IOPS" section in Primary instance types. |
ESSD of PL1: 20 GB to 32,000 GB ESSD of PL2: 500 GB to 32,000 GB ESSD of PL3: 1,500 GB to 32,000 GB |
| pg.n4.2c.2m | 2 cores, 8 GB | 800 | |||
| pg.n4.4c.2m | 4 cores, 16 GB | 1,600 | |||
| pg.n4.6c.2m | 6 cores, 24 GB | 2,400 | |||
| pg.n4.8c.2m | 8 cores, 32 GB | 3,200 | |||
| pg.n4.12c.2m | 12 cores, 48GB | 4,800 |
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 | For more information, see the "IOPS" section in Primary instance types. |
| 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 | |
| pg.n2.small.2c | 1 | 2 | 200 | |
| pg.n2.medium.2c | 2 | 4 | 400 | |
| rds.pg.s1.small | 1 | 2 | 200 |