Help Center/ Relational Database Service/ Performance White Paper/ RDS for PostgreSQL/ RDS for PostgreSQL 14 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 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

373.53

7,470.64

See About IOPS.

4

8

748.80

14,976.09

8

16

1,563.35

31,266.94

16

32

1,873.68

37,473.69
Table 2 vCPU:Memory = 1:4

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

8

472.01

9,440.15

See About IOPS.

4

16

994.46

19,889.28

8

32

1,806.45

36,129.18

16

64

2,551.62

51,032.43
Table 3 vCPU:Memory = 1:8

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

16

463.48

9,269.67

See About IOPS.

4

32

1,103.30

22,065.92

8

64

1,996.53

39,930.74

16

128

3,778.67

75,573.89

Test Results

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