Help Center/ Relational Database Service_RDS for PostgreSQL/ Performance White Paper/ RDS for PostgreSQL 18 Test Data/ General-Purpose DB Instances
Updated on 2026-09-17 GMT+08:00
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General-Purpose DB Instances

This section provides test data of RDS for PostgreSQL 18 x86-based general-purpose instances using cloud SSDs.

Test Data

Table 1 vCPU:Memory = 1:2

vCPUs

Memory (GB)

TPS

QPS

IOPS

1

2

201.90

4,038.00

The input/output operations per second (IOPS) supported depends on the I/O performance of Elastic Volume Service (EVS) disks. For details, see Disk Types and Performance of Elastic Volume Service Service Overview.

2

4

387.36

7,747.18

4

8

823.35

16,467.17

8

16

1,501.20

30,023.87
Table 2 vCPU:Memory = 1:4

vCPUs

Memory (GB)

TPS

QPS

IOPS

2

8

429.92

8,598.27

The input/output operations per second (IOPS) supported depends on the I/O performance of Elastic Volume Service (EVS) disks. For details, see Disk Types and Performance of Elastic Volume Service Service Overview.

4

16

953.77

19,075.51

8

32

1,837.77

36,755.61

Test Results

Figure 1 vCPU:Memory = 1:2
Figure 2 vCPU:Memory = 1:4
Parent Topic: RDS for PostgreSQL 18 Test Data