Help Center/ Relational Database Service/ Performance White Paper/ RDS for PostgreSQL/ RDS for PostgreSQL 13 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

437.45

8,748.99

See About IOPS.

4

16

896.84

17,936.72

8

32

1,819.93

36,398.77

16

64

2,600.93

52,018.73

32

128

5,428.06

108,572.08

64

256

12,102.77

242,079.30
Table 2 vCPU:Memory = 1:8

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

16

528.85

10,577.07

See About IOPS.

4

32

1,002.06

20,041.23

8

64

1,904.04

38,080.91

16

128

3,928.59

78,572.08

64

512

7,485.78

149,732.20

Test Results

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