Help Center/ Relational Database Service/ Performance White Paper/ RDS for PostgreSQL/ RDS for PostgreSQL 15 Test Data/ Dedicated DB Instances
Updated on 2025-03-19 GMT+08:00
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Dedicated DB Instances

This section provides test data of RDS for PostgreSQL 15 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

378.99

7,579.83

See About IOPS.

4

8

838.37

16,767.38

8

16

1,577.04

31,540.74

16

32

1,850.72

37,014.46
Table 2 vCPU:Memory = 1:4

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

8

465.93

9,318.54

See About IOPS.

4

16

994.98

19,899.65

8

32

1,825.27

36,505.56

16

64

2,582.68

51,653.81
Table 3 vCPU:Memory = 1:8

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

16

495.95

9,919.00

See About IOPS.

4

32

1,096.84

21,936.72

8

64

1,924.42

38,488.57

16

128

3,943.78

78,875.96

Test Results

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