Help Center> Relational Database Service> Performance White Paper> RDS for PostgreSQL> RDS for PostgreSQL 14 Test Data> Dedicated DB Instances
Updated on 2023-08-25 GMT+08:00
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Dedicated DB Instances

This section provides test data of RDS for PostgreSQL 14 x86-based dedicated instances using cloud SSDs.

About IOPS

The IOPS supported by RDS for PostgreSQL depends on the I/O performance of Elastic Volume Service (EVS) disks. For details, see Disk Types and Performance in the Elastic Volume Service Service Overview.

Test Data

Table 1 vCPU:Memory = 1:2

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

4

381

7,631

See About IOPS.

4

8

890

17,804

8

16

1,573

31,463

16

32

1,896

37,931
Table 2 vCPU:Memory = 1:4

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

8

466

9,336

See About IOPS.

4

16

1,047

20,958

8

32

1,881

37,630

16

64

2,935

58,704
Table 3 vCPU:Memory = 1:8

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

16

529

10,595

See About IOPS.

4

32

1,118

22,364

8

64

2,091

41,826

16

128

3,843

76,884

Test Results

Figure 1 vCPU:Memory = 1:2
Figure 2 vCPU:Memory = 1:4
Figure 3 vCPU:Memory = 1:8