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

This section provides test data of RDS for PostgreSQL 15 x86-based general-purpose 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

1

2

185.21

3,704.27

See About IOPS.

2

4

371.97

7,439.43

4

8

821.00

16,420.05

8

16

1,517.95

30,358.98
Table 2 vCPU:Memory = 1:4

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

8

431.72

8,634.30

See About IOPS.

4

16

926.94

18,538.85

8

32

1,827.36

36,547.27

Test Results

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