Aurora DB instance classes - Amazon Aurora
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Aurora DB instance classes

The DB instance class determines the computation and memory capacity of an Amazon Aurora DB instance. The DB instance class that you need depends on your processing power and memory requirements.

A DB instance class consists of both the DB instance type and the size. For example, db.m6g is a general-purpose DB instance type powered by Amazon Graviton2 processors, while db.m6g.2xlarge is a DB instance class within the db.m6g instance type.

DB instance class types

Amazon Aurora supports three types of instance classes: Aurora Serverless v2, memory optimized, and burstable performance. For more information about Amazon EC2 instance types, see Instance types in the Amazon EC2 documentation.

The following is the Aurora Serverless v2 type available:

  • db.serverless – A special DB instance class used by Aurora Serverless v2. Aurora adjusts the compute, memory, and network resources dynamically as the workload changes. For usage details, see Using Aurora Serverless v2.

The following are the memory optimized DB instance types available:

  • db.x2g – Instance classes optimized for memory-intensive applications and powered by Amazon Graviton2 processors. These offer low cost per GiB of memory.

  • db.r6g – Instance classes powered by Amazon Graviton2 processors. These are ideal for running memory-intensive workloads in open-source databases such as MySQL and PostgreSQL.

  • db.r5 – Instance classes optimized for memory-intensive applications. These offer improved networking performance. They are powered by the Amazon Nitro System, a combination of dedicated hardware and lightweight hypervisor.

  • db.r3 – Instance classes that provide memory optimization.

The following are the burstable-performance DB instance types available:

  • db.t4g – Burstable instance classes powered by Arm-based Amazon Graviton2 processors. These deliver better price performance than previous burstable-performance DB instance classes for a broad set of burstable workloads. T4g instances are configured for Unlimited mode, which means that they can burst beyond the baseline over a 24-hour window for an additional charge. We recommend using these instance classes only for development and test servers, or other nonproduction servers.

  • db.t3 – Instance classes that provide a baseline performance level, with the ability to burst to full CPU usage. T3 instances are configured for Unlimited mode. These instance classes provide more computing capacity than the previous db.t2 instance classes. They are powered by the Amazon Nitro System, a combination of dedicated hardware and lightweight hypervisor. We recommend using these instance classes only for development and test servers, or other nonproduction servers.

  • db.t2 – Instance classes that provide a baseline performance level, with the ability to burst to full CPU usage. T2 instances can be configured for Unlimited mode. We recommend using these instance classes only for development and test servers, or other nonproduction servers.

For DB instance class hardware specifications, see Hardware specifications for DB instance classes for Aurora.

Supported DB engines for DB instance classes

In the following table, you can find details about supported Amazon Aurora DB instance classes for the Aurora DB engines.

Instance class Aurora MySQL Aurora PostgreSQL
db.serverless – Aurora Serverless v2 instance class with automatic capacity scaling
db.serverless See Requirements for Aurora Serverless v2 See Requirements for Aurora Serverless v2
db.x2g – memory-optimized instance classes powered by Amazon Graviton2 processors
db.x2g.16xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.x2g.12xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.x2g.8xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.x2g.4xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.x2g.2xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.x2g.xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.x2g.large 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.r6g – memory-optimized instance classes powered by Amazon Graviton2 processors
db.r6g.16xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.r6g.12xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.r6g.8xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.r6g.4xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.r6g.2xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.r6g.xlarge 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.r6g.large 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.r5 – memory-optimized instance classes
db.r5.24xlarge 1.22 and higher, 2.06 and higher, 3.01.0 and higher Yes
db.r5.16xlarge 1.22 and higher, 2.06 and higher, 3.01.0 and higher Yes
db.r5.12xlarge 1.14.4 and higher, 3.01.0 and higher Yes
db.r5.8xlarge 1.22 and higher, 2.06 and higher, 3.01.0 and higher Yes
db.r5.4xlarge 1.14.4 and higher, 3.01.0 and higher Yes
db.r5.2xlarge 1.14.4 and higher, 3.01.0 and higher Yes
db.r5.xlarge 1.14.4 and higher, 3.01.0 and higher Yes
db.r5.large 1.14.4 and higher, 3.01.0 and higher Yes
db.r4 – memory-optimized instance classes
db.r4.16xlarge 1.14.4 and higher; not supported in 3.01.0 and higher 12.4 and higher, 11.4 and higher, 10.4 and higher, and 9.6.3 and higher
db.r4.8xlarge 1.14.4 and higher; not supported in 3.01.0 and higher 12.4 and higher, 11.4 and higher, 10.4 and higher, and 9.6.3 and higher
db.r4.4xlarge 1.14.4 and higher; not supported in 3.01.0 and higher 12.4 and higher, 11.4 and higher, 10.4 and higher, and 9.6.3 and higher
db.r4.2xlarge 1.14.4 and higher; not supported in 3.01.0 and higher 12.4 and higher, 11.4 and higher, 10.4 and higher, and 9.6.3 and higher
db.r4.xlarge 1.14.4 and higher; not supported in 3.01.0 and higher 12.4 and higher, 11.4 and higher, 10.4 and higher, and 9.6.3 and higher
db.r4.large 1.14.4 and higher; not supported in 3.01.0 and higher 12.4 and higher, 11.4 and higher, 10.4 and higher, and 9.6.3 and higher
db.r3 – memory-optimized instance classes
db.r3.8xlarge All 1.x and 2.x versions; not supported in 3.01.0 and higher No
db.r3.4xlarge All 1.x and 2.x versions; not supported in 3.01.0 and higher No
db.r3.2xlarge All 1.x and 2.x versions; not supported in 3.01.0 and higher No
db.r3.xlarge All 1.x and 2.x versions; not supported in 3.01.0 and higher No
db.r3.large All 1.x and 2.x versions; not supported in 3.01.0 and higher No
db.t4g – burstable-performance instance classes powered by Amazon Graviton2 processors
db.t4g.2xlarge No No
db.t4g.xlarge No No
db.t4g.large 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.t4g.medium 2.09.2 and higher, 2.10.0 and higher, 3.01.0 and higher 14.3, 13.3, 12.4 and higher, 11.9 and higher
db.t4g.small No No
db.t3 – burstable-performance instance classes
db.t3.2xlarge No No
db.t3.xlarge No No
db.t3.large 2.10 and higher, 3.01.0 and higher 14.3, 13.3, 11.6 and higher, 10.11 and higher
db.t3.medium 1.14.4 and higher, 3.01.0 and higher 14.3, 13.3, 10.11 and higher
db.t3.small 1.14.4 and higher; not supported in 3.01.0 and higher No
db.t3.micro No No
db.t2 – burstable-performance instance classes
db.t2.medium All 1.x and 2.x versions; not supported in 3.01.0 and higher No
db.t2.small All 1.x and 2.x versions; not supported in 3.01.0 and higher No

Determining DB instance class support in Amazon Web Services Regions

To determine the DB instance classes supported by each DB engine in a specific Amazon Web Services Region, you can use the Amazon Web Services Management Console, the Amazon RDS Pricing page, or the describe-orderable-db-instance-options Amazon CLI command.

Note

When you perform operations with the Amazon CLI, such as creating or modifying a DB cluster, it automatically shows the supported DB instance classes for a specific DB engine, DB engine version, and Amazon Web Services Region.

Using the Amazon RDS pricing page to determine DB instance class support in Amazon Web Services Regions

You can use the Amazon RDS Pricing page to determine the DB instance classes supported by each DB engine in a specific Amazon Web Services Region.

To use the pricing page to determine the DB instance classes supported by each engine in a Region

  1. Go to Amazon RDS Pricing.

  2. Choose Amazon Aurora.

  3. In DB Instances, open MySQL-Compatible Edition or PostgreSQL-Compatible Edition.

  4. To see the DB instance classes available in an Amazon Web Services Region, choose the Amazon Web Services Region in Region in the appropriate subsection.

Using the Amazon CLI to determine DB instance class support in Amazon Web Services Regions

You can use the Amazon CLI to determine which DB instance classes are supported for specific DB engines and DB engine versions in an Amazon Web Services Region.

To use the Amazon CLI examples in this section, make sure that you enter valid values for the DB engine, DB engine version, DB instance class, and Amazon Web Services Region. The following table shows the valid DB engine values.

Engine name Engine value in CLI commands More information about versions

MySQL 5.6-compatible Aurora

aurora

Database engine updates for Amazon Aurora MySQL version 1 in the Release Notes for Aurora MySQL

MySQL 5.7-compatible and 8.0-compatible Aurora

aurora-mysql

Database engine updates for Amazon Aurora MySQL version 2 and Database engine updates for Amazon Aurora MySQL version 3 in the Release Notes for Aurora MySQL

Aurora PostgreSQL

aurora-postgresql

Release Notes for Aurora PostgreSQL

For information about Amazon Web Services Region names, see Amazon Regions Availability Zones.

The following examples demonstrate how to determine DB instance class support in an Amazon Web Services Region using the describe-orderable-db-instance-options Amazon CLI command.

Listing the DB instance classes that are supported by a specific DB engine version in an Amazon Web Services Region

To list the DB instance classes that are supported by a specific DB engine version in an Amazon Web Services Region, run the following command.

For Linux, macOS, or Unix:

aws rds describe-orderable-db-instance-options --engine engine --engine-version version \ --query "OrderableDBInstanceOptions[].{DBInstanceClass:DBInstanceClass,SupportedEngineModes:SupportedEngineModes[0]}" \ --output table \ --region region

For Windows:

aws rds describe-orderable-db-instance-options --engine engine --engine-version version ^ --query "OrderableDBInstanceOptions[].{DBInstanceClass:DBInstanceClass,SupportedEngineModes:SupportedEngineModes[0]}" ^ --output table ^ --region region

The output also shows the engine modes that are supported for each DB instance class.

For example, the following command lists the supported DB instance classes for version 13.6 of the Aurora PostgreSQL DB engine in US East (N. Virginia).

For Linux, macOS, or Unix:

aws rds describe-orderable-db-instance-options --engine aurora-postgresql --engine-version 13.6 \ --query "OrderableDBInstanceOptions[].{DBInstanceClass:DBInstanceClass,SupportedEngineModes:SupportedEngineModes[0]}" \ --output table \ --region us-east-1

For Windows:

aws rds describe-orderable-db-instance-options --engine aurora-postgresql --engine-version 13.6 ^ --query "OrderableDBInstanceOptions[].{DBInstanceClass:DBInstanceClass,SupportedEngineModes:SupportedEngineModes[0]}" ^ --output table ^ --region us-east-1

Listing the DB engine versions that support a specific DB instance class in an Amazon Web Services Region

To list the DB engine versions that support a specific DB instance class in an Amazon Web Services Region, run the following command.

For Linux, macOS, or Unix:

aws rds describe-orderable-db-instance-options --engine engine --db-instance-class DB_instance_class \ --query "OrderableDBInstanceOptions[].{EngineVersion:EngineVersion,SupportedEngineModes:SupportedEngineModes[0]}" \ --output table \ --region region

For Windows:

aws rds describe-orderable-db-instance-options --engine engine --db-instance-class DB_instance_class ^ --query "OrderableDBInstanceOptions[].{EngineVersion:EngineVersion,SupportedEngineModes:SupportedEngineModes[0]}" ^ --output table ^ --region region

The output also shows the engine modes that are supported for each DB engine version.

For example, the following command lists the DB engine versions of the Aurora PostgreSQL DB engine that support the db.r5.large DB instance class in US East (N. Virginia).

For Linux, macOS, or Unix:

aws rds describe-orderable-db-instance-options --engine aurora-postgresql --db-instance-class db.r5.large \ --query "OrderableDBInstanceOptions[].{EngineVersion:EngineVersion,SupportedEngineModes:SupportedEngineModes[0]}" \ --output table \ --region us-east-1

For Windows:

aws rds describe-orderable-db-instance-options --engine aurora-postgresql --db-instance-class db.r5.large ^ --query "OrderableDBInstanceOptions[].{EngineVersion:EngineVersion,SupportedEngineModes:SupportedEngineModes[0]}" ^ --output table ^ --region us-east-1

Hardware specifications 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. Bandwidth (Mbps)

The maximum 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 Performance

The network speed relative to other DB instance classes.

In the following table, 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.

Instance class vCPU ECU Memory (GiB) Max. bandwidth (mbps) of local storage Network performance
db.x2g – memory-optimized instance classes
db.x2g.16xlarge 64 1024 19,000 25 Gbps
db.x2g.12xlarge 48 768 14,250 20 Gbps
db.x2g.8xlarge 32 512 9,500 12 Gbps
db.x2g.4xlarge 16 256 4,750 Up to 10 Gbps
db.x2g.2xlarge 8 128 Up to 4,750 Up to 10 Gbps
db.x2g.xlarge 4 64 Up to 4,750 Up to 10 Gbps
db.x2g.large 2 32 Up to 4,750 Up to 10 Gbps
db.r6g – memory-optimized instance classes powered by Amazon Graviton2 processors
db.r6g.16xlarge 64 512 19,000 25 Gbps
db.r6g.12xlarge 48 384 13,500 20 Gbps
db.r6g.8xlarge 32 256 9,000 12 Gbps
db.r6g.4xlarge 16 128 4,750 Up to 10 Gbps
db.r6g.2xlarge 8 64 Up to 4,750 Up to 10 Gbps
db.r6g.xlarge 4 32 Up to 4,750 Up to 10 Gbps
db.r6g.large 2 16 Up to 4,750 Up to 10 Gbps
db.r5 – memory-optimized instance classes
db.r5.24xlarge 96 347 768 19,000 25 Gbps
db.r5.16xlarge 64 264 512 13,600 20 Gbps
db.r5.12xlarge 48 173 384 9,500 10 Gbps
db.r5.8xlarge 32 132 256 6,800 10 Gbps
db.r5.4xlarge 16 71 128 4,750 Up to 10 Gbps
db.r5.2xlarge 8 38 64 Up to 4,750 Up to 10 Gbps
db.r5.xlarge 4 19 32 Up to 4,750 Up to 10 Gbps
db.r5.large 2 10 16 Up to 4,750 Up to 10 Gbps
db.r4 – memory-optimized instance classes
db.r4.16xlarge 64 195 488 14,000 25 Gbps
db.r4.8xlarge 32 99 244 7,000 10 Gbps
db.r4.4xlarge 16 53 122 3,500 Up to 10 Gbps
db.r4.2xlarge 8 27 61 1,700 Up to 10 Gbps
db.r4.xlarge 4 13.5 30.5 850 Up to 10 Gbps
db.r4.large 2 7 15.25 425 Up to 10 Gbps
db.r3 – memory-optimized instance classes
db.r3.8xlarge 32 104 244 10 Gbps
db.r3.4xlarge 16 52 122 2,000 High
db.r3.2xlarge 8 26 61 1,000 High
db.r3.xlarge 4 13 30.5 500 Moderate
db.r3.large 2 6.5 15.25 Moderate
db.t4g – burstable-performance instance classes
db.t4g.large 2 8 Up to 2,780 Up to 5 Gbps
db.t4g.medium 2 4 Up to 2,085 Up to 5 Gbps
db.t3 – burstable-performance instance classes
db.t3.large 2 Variable 8 Up to 2,048 Up to 5 Gbps
db.t3.medium 2 Variable 4 Up to 1,536 Up to 5 Gbps
db.t3.small 2 Variable 2 Up to 1,536 Up to 5 Gbps
db.t2 – burstable-performance instance classes
db.t2.medium 2 Variable 4 Moderate
db.t2.small 1 Variable 2 Low

** The r3.8xlarge instance doesn't have dedicated EBS bandwidth and therefore doesn't offer EBS optimization. On this instance, network traffic and Amazon EBS traffic share the same 10-gigabit network interface.