Dedicated DB Instances

Updated on 2025-03-19 GMT+08:00

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This section provides test data of RDS for PostgreSQL 14 x86-based dedicated 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
2	4	373.53	7,470.64	See About IOPS.
4	8	748.80	14,976.09
8	16	1,563.35	31,266.94
16	32	1,873.68	37,473.69

**Table 2** vCPU:Memory = 1:4
vCPUs	Memory (GB)	TPS	QPS	IOPS
2	8	472.01	9,440.15	See About IOPS.
4	16	994.46	19,889.28
8	32	1,806.45	36,129.18
16	64	2,551.62	51,032.43

**Table 3** vCPU:Memory = 1:8
vCPUs	Memory (GB)	TPS	QPS	IOPS
2	16	463.48	9,269.67	See About IOPS.
4	32	1,103.30	22,065.92
8	64	1,996.53	39,930.74
16	128	3,778.67	75,573.89

Test Results

Figure 1 vCPU:Memory = 1:2

Figure 2 vCPU:Memory = 1:4

Figure 3 vCPU:Memory = 1:8

Parent topic: RDS for PostgreSQL 14 Test Data

Previous topic: General-Purpose DB Instances

Next topic: RDS for PostgreSQL 15 Test Data

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