Hardware specifications for DB instance classes for Aurora

In the table in this section, you can find hardware details about the Amazon RDS DB instance classes for Aurora.

For information about Aurora DB engine support for each DB instance class, see Supported DB engines for DB instance classes.

Hardware terminology for DB instance classes for Aurora

The following terminology is used to describe hardware specifications for DB instance classes:

vCPU

The number of virtual central processing units (CPUs). A virtual CPU is a unit of capacity that you can use to compare DB instance classes. Instead of purchasing or leasing a particular processor to use for several months or years, you are renting capacity by the hour. Our goal is to make a consistent and specific amount of CPU capacity available, within the limits of the actual underlying hardware.

ECU

The relative measure of the integer processing power of an Amazon EC2 instance. To make it easy for developers to compare CPU capacity between different instance classes, we have defined an Amazon EC2 Compute Unit. The amount of CPU that is allocated to a particular instance is expressed in terms of these EC2 Compute Units. One ECU currently provides CPU capacity equivalent to a 1.0–1.2 GHz 2007 Opteron or 2007 Xeon processor.

Memory (GiB)

The RAM, in gibibytes, allocated to the DB instance. There is often a consistent ratio between memory and vCPU. As an example, take the db.r4 instance class, which has a memory to vCPU ratio similar to the db.r5 instance class. However, for most use cases the db.r5 instance class provides better, more consistent performance than the db.r4 instance class.

Max. EBS bandwidth (Mbps)

The maximum EBS bandwidth in megabits per second. Divide by 8 to get the expected throughput in megabytes per second.

Note

This figure refers to I/O bandwidth for local storage within the DB instance. It doesn't apply to communication with the Aurora cluster volume.

Network bandwidth

The network speed relative to other DB instance classes.

Hardware specifications for the memory-optimized instance classes

The following tables show the compute, memory, storage, and bandwidth specifications for the memory-optimized instance classes.

db.x2g – memory-optimized instance classes with AWS Graviton2 processors

Instance class	vCPU	ECU	Memory (GiB)	Instance storage (GiB)	Max. EBS bandwidth (Mbps)	Network bandwidth (Gbps)
db.x2g.16xlarge	64	—	1024	EBS-optimized only	19,000	25
db.x2g.12xlarge	48	—	768	EBS-optimized only	14,250	20
db.x2g.8xlarge	32	—	512	EBS-optimized only	9,500	12
db.x2g.4xlarge	16	—	256	EBS-optimized only	4,750	Up to 10
db.x2g.2xlarge	8	—	128	EBS-optimized only	Up to 4,750	Up to 10
db.x2g.xlarge	4	—	64	EBS-optimized only	Up to 4,750	Up to 10
db.x2g.large	2	—	32	EBS-optimized only	Up to 4,750	Up to 10

db.r7g – memory-optimized instance classes with AWS Graviton3 processors

Instance class	vCPU	ECU	Memory (GiB)	Instance storage (GiB)	Max. EBS bandwidth (Mbps)	Network bandwidth (Gbps)
db.r7g.16xlarge	64	—	512	EBS-optimized only	20,000	30
db.r7g.12xlarge	48	—	384	EBS-optimized only	15,000	22.5
db.r7g.8xlarge	32	—	256	EBS-optimized only	10,000	15
db.r7g.4xlarge	16	—	128	EBS-optimized only	Up to 10,000	Up to 15
db.r7g.2xlarge	8	—	64	EBS-optimized only	Up to 10,000	Up to 15
db.r7g.xlarge	4	—	32	EBS-optimized only	Up to 10,000	Up to 12.5
db.r7g.large	2	—	16	EBS-optimized only	Up to 10,000	Up to 12.5

db.r6id – memory-optimized instance classes with 3rd generation Intel Xeon Scalable processors and SSD storage

Instance class	vCPU	ECU	Memory (GiB)	Instance storage (GiB)	Max. EBS bandwidth (Mbps)	Network bandwidth (Gbps)
db.r6id.32xlarge	128	—	1,024	4x1900 NVMe SSD	40,000	50
db.r6id.24xlarge	96	—	768	4x1425 NVMe SSD	30,000	37.5

db.r6gd – memory-optimized instance classes with AWS Graviton2 processors and SSD storage

Instance class	vCPU	ECU	Memory (GiB)	Instance storage (GiB)	Max. EBS bandwidth (Mbps)	Network bandwidth (Gbps)
db.r6gd.16xlarge	64	—	512	2 x 1900 NVMe SSD	19,000	25
db.r6gd.12xlarge	48	—	384	2 x 1425 NVMe SSD	13,500	20
db.r6gd.8xlarge	32	—	256	1 x 1900 NVMe SSD	9,000	12
db.r6gd.4xlarge	16	—	128	1 x 950 NVMe SSD	4,750	Up to 10
db.r6gd.2xlarge	8	—	64	1 x 474 NVMe SSD	Up to 4,750	Up to 10
db.r6gd.xlarge	4	—	32	1 x 237 NVMe SSD	Up to 4,750	Up to 10

db.r6g – memory-optimized instance classes with AWS Graviton2 processors

Instance class	vCPU	ECU	Memory (GiB)	Instance storage (GiB)	Max. EBS bandwidth (Mbps)	Network bandwidth (Gbps)
db.r6g.16xlarge	64	—	512	EBS-optimized only	19,000	25
db.r6g.12xlarge	48	—	384	EBS-optimized only	13,500	20
db.r6g.8xlarge	32	—	256	EBS-optimized only	9,000	12
db.r6g.4xlarge	16	—	128	EBS-optimized only	4,750	Up to 10
db.r6g.2xlarge	8	—	64	EBS-optimized only	Up to 4,750	Up to 10
db.r6g.xlarge	4	—	32	EBS-optimized only	Up to 4,750	Up to 10
db.r6g.large	2	—	16	EBS-optimized only	Up to 4,750	Up to 10

db.r6i – memory-optimized instance classes with 3rd Generation Intel Xeon Scalable processors

Instance class	vCPU	ECU	Memory (GiB)	Instance storage (GiB)	Max. EBS bandwidth (Mbps)	Network bandwidth (Gbps)
db.r6i.32xlarge	128	—	1,024	EBS-optimized only	40,000	50
db.r6i.24xlarge	96	—	768	EBS-optimized only	30,000	37.5
db.r6i.16xlarge	64	—	512	EBS-optimized only	20,000	25
db.r6i.12xlarge	48	—	384	EBS-optimized only	15,000	18.75
db.r6i.8xlarge	32	—	256	EBS-optimized only	10,000	12.5
db.r6i.4xlarge	16	—	128	EBS-optimized only	Up to 10,000	Up to 12.5
db.r6i.2xlarge	8	—	64	EBS-optimized only	Up to 10,000	Up to 12.5
db.r6i.xlarge	4	—	32	EBS-optimized only	Up to 10,000	Up to 12.5
db.r6i.large	2	—	16	EBS-optimized only	Up to 10,000	Up to 12.5

db.r5 – memory-optimized instance classes

Instance class	vCPU	ECU	Memory (GiB)	Instance storage (GiB)	Max. EBS bandwidth (Mbps)	Network bandwidth (Gbps)
db.r5.24xlarge	96	347	768	EBS-optimized only	19,000	25
db.r5.16xlarge	64	264	512	EBS-optimized only	13,600	20
db.r5.12xlarge	48	173	384	EBS-optimized only	9,500	12
db.r5.8xlarge	32	132	256	EBS-optimized only	6,800	10
db.r5.4xlarge	16	71	128	EBS-optimized only	4,750	Up to 10
db.r5.2xlarge	8	38	64	EBS-optimized only	Up to 4,750	Up to 10
db.r5.xlarge	4	19	32	EBS-optimized only	Up to 4,750	Up to 10
db.r5.large	2	10	16	EBS-optimized only	Up to 4,750	Up to 10

db.r4 – memory-optimized instance classes with Intel Xeon Scalable processors

Instance class	vCPU	ECU	Memory (GiB)	Instance storage (GiB)	Max. EBS bandwidth (Mbps)	Network bandwidth (Gbps)
db.r4.16xlarge	64	195	488	EBS-optimized only	14,000	25
db.r4.8xlarge	32	99	244	EBS-optimized only	7,000	10
db.r4.4xlarge	16	53	122	EBS-optimized only	3,500	Up to 10
db.r4.2xlarge	8	27	61	EBS-optimized only	1,700	Up to 10
db.r4.xlarge	4	13.5	30.5	EBS-optimized only	850	Up to 10
db.r4.large	2	7	15.25	EBS-optimized only	425	Up to 10

Hardware specifications for the burstable-performance instance classes

The following tables show the compute, memory, storage, and bandwidth specifications for the burstable-performance instance classes.

db.t4g – burstable-performance instance classes powered by AWS Graviton2 processors

Instance class	vCPU	ECU	Memory (GiB)	Instance storage (GiB)	Max. EBS bandwidth (Mbps)	Network bandwidth (Gbps)
db.t4g.large	2	—	8	EBS-optimized only	Up to 2,780	Up to 5
db.t4g.medium	2	—	4	EBS-optimized only	Up to 2,085	Up to 5

db.t3 – burstable-performance instance classes

Instance class	vCPU	ECU	Memory (GiB)	Instance storage (GiB)	Max. EBS bandwidth (Mbps)	Network bandwidth (Gbps)
db.t3.large	2	Variable	8	EBS-optimized only	Up to 2,048	Up to 5
db.t3.medium	2	Variable	4	EBS-optimized only	Up to 1,536	Up to 5
db.t3.small	2	Variable	2	EBS-optimized only	Up to 1,536	Up to 5

db.t2 – burstable-performance instance classes

Instance class	vCPU	ECU	Memory (GiB)	Instance storage (GiB)	Max. EBS bandwidth (Mbps)	Network bandwidth (Gbps)
db.t2.medium	2	Variable	4	EBS only	—	Moderate
db.t2.small	1	Variable	2	EBS only	—	Low