Help Center/ Relational Database Service/ Performance White Paper/ RDS for PostgreSQL/ RDS for PostgreSQL 12 Test Data/ Dedicated DB Instances
Updated on 2025-03-19 GMT+08:00
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Dedicated DB Instances

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 = 1:4

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

8

435.68

8,713.58

See About IOPS.

4

16

938.77

18,775.34

8

32

1,735.35

34,707.2

16

64

2,482.57

49,652.9

32

128

4,875.01

97,508.19

64

256

8,839.4

176,804.32
Table 2 vCPU:Memory = 1:8

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

16

497.57

9,951.38

See About IOPS.

4

32

1,001.21

20,024.11

8

64

1,978.29

39,566.03

16

128

3,513.35

70,267.23

64

512

12,032.16

240,671.39

Test Results

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