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ApsaraDB RDS:Instance types for read-only ApsaraDB RDS for PostgreSQL instances

Last Updated:Mar 07, 2024

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. For more information about the prices, visit the ApsaraDB RDS buy page.

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 Primary ApsaraDB RDS instance types.

  • 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

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

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 economy 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

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

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 Read-only ApsaraDB RDS instance types.

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