Help Center/ Relational Database Service/ Performance White Paper/ RDS for PostgreSQL/ RDS for PostgreSQL 12 Test Data/ General-Purpose DB Instances
Updated on 2025-03-19 GMT+08:00
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General-Purpose 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 = 1:2

vCPUs

Memory (GB)

TPS

QPS

IOPS

1

2

172.88

3,457.69

See About IOPS.

2

4

387.63

7,752.63

4

8

823.89

16,477.76

8

16

1538.08

30761.58
Table 2 vCPU:Memory = 1:4

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

8

461.22

9,224.35

See About IOPS.

4

16

843.00

16,860.02

8

32

1,786.72

35,734.52

Test Results

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