Supported node types - Amazon ElastiCache
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Supported node types

For information on which node size to use, see Choosing your Memcached node size.

ElastiCache supports the following node types. Generally speaking, the current generation types provide more memory and computational power at lower cost when compared to their equivalent previous generation counterparts.

For more information on performance details for each node type, see Amazon EC2 Instance Types.

  • General purpose:

    • Current generation:

      M6g node types (available only for Memcached engine version 1.5.16 onward).

      cache.m6g.large, cache.m6g.xlarge, cache.m6g.2xlarge, cache.m6g.4xlarge, cache.m6g.8xlarge, cache.m6g.12xlarge, cache.m6g.16xlarge


      For region availability, see Supported node types by Amazon Region.

      M5 node types: cache.m5.large, cache.m5.xlarge, cache.m5.2xlarge, cache.m5.4xlarge, cache.m5.12xlarge, cache.m5.24xlarge

      M4 node types: cache.m4.large, cache.m4.xlarge, cache.m4.2xlarge, cache.m4.4xlarge, cache.m4.10xlarge

      T4g node types (available only for Memcached engine version 1.5.16 onward).

      cache.t4g.micro, cache.t4g.small, cache.t4g.medium

      T3 node types: cache.t3.micro, cache.t3.small, cache.t3.medium

      T2 node types: cache.t2.micro, cache.t2.small, cache.t2.medium

    • Previous generation: (not recommended. Existing clusters are still supported but creation of new clusters is not supported for these types.)

      T1 node types: cache.t1.micro

      M1 node types: cache.m1.small, cache.m1.medium, cache.m1.large, cache.m1.xlarge

      M3 node types: cache.m3.medium, cache.m3.large, cache.m3.xlarge, cache.m3.2xlarge

  • Compute optimized:

    • Previous generation: (not recommended)

      C1 node types: cache.c1.xlarge

  • Memory optimized:

    • Current generation:

      (R6g node types are available only for Memcached engine version 1.5.16 onward.)

      R6g node types: cache.r6g.large, cache.r6g.xlarge, cache.r6g.2xlarge, cache.r6g.4xlarge, cache.r6g.8xlarge, cache.r6g.12xlarge, cache.r6g.16xlarge


      For region availability, see Supported node types by Amazon Region.

      R5 node types: cache.r5.large, cache.r5.xlarge, cache.r5.2xlarge, cache.r5.4xlarge, cache.r5.12xlarge, cache.r5.24xlarge

      R4 node types: cache.r4.large, cache.r4.xlarge, cache.r4.2xlarge, cache.r4.4xlarge, cache.r4.8xlarge, cache.r4.16xlarge

    • Previous generation: (not recommended)

      M2 node types: cache.m2.xlarge, cache.m2.2xlarge, cache.m2.4xlarge

      R3 node types: cache.r3.large, cache.r3.xlarge, cache.r3.2xlarge, cache.r3.4xlarge, cache.r3.8xlarge

You can launch general-purpose burstable T4g, T3-Standard and T2-Standard cache nodes in Amazon ElastiCache. These nodes provide a baseline level of CPU performance with the ability to burst CPU usage at any time until the accrued credits are exhausted. A CPU credit provides the performance of a full CPU core for one minute.

Amazon ElastiCache's T4g, T3 and T2 nodes are configured as standard and suited for workloads with an average CPU utilization that is consistently below the baseline performance of the instance. To burst above the baseline, the node spends credits that it has accrued in its CPU credit balance. If the node is running low on accrued credits, performance is gradually lowered to the baseline performance level. This gradual lowering ensures the node doesn't experience a sharp performance drop-off when its accrued CPU credit balance is depleted. For more information, see CPU Credits and Baseline Performance for Burstable Performance Instances in the Amazon EC2 User Guide.

The following table lists the burstable performance node types, the rate at which CPU credits are earned per hour. It also shows the maximum number of earned CPU credits that a node can accrue and the number of vCPUs per node. In addition, it gives the baseline performance level as a percentage of a full core performance (using a single vCPU).

Node type CPU credits earned per hour Maximum earned credits that can be accrued* vCPUs Baseline performance per vCPU Memory (GiB) Network performance
t4g.micro 12 288 2 10% 0.5 Up to 5 Gigabit
t4g.small 24 576 2 20% 1.37 Up to 5 Gigabit
t4g.medium 24 576 2 20% 3.09 Up to 5 Gigabit
t3.micro 12 288 2 10% 0.5 Up to 5 Gigabit
t3.small 24 576 2 20% 1.37 Up to 5 Gigabit
t3.medium 24 576 2 20% 3.09 Up to 5 Gigabit
t2.micro 6 144 1 10% 0.5 Low to moderate
t2.small 12 288 1 20% 1.55 Low to moderate
t2.medium 24 576 2 20% 3.22 Low to moderate

* The number of credits that can be accrued is equivalent to the number of credits that can be earned in a 24-hour period.

** The baseline performance in the table is per vCPU. Some node sizes that have more than one vCPU. For these, calculate the baseline CPU utilization for the node by multiplying the vCPU percentage by the number of vCPUs.

The following CPU credit metrics are available for T3 and T4g burstable performance instances:


These metrics are not available for T2 burstable performance instances.

  • CPUCreditUsage

  • CPUCreditBalance

For more information on these metrics, see CPU Credit Metrics.

In addition, be aware of these details:

  • All current generation node types are created in a virtual private cloud (VPC) based on Amazon VPC by default.


Supported engine versions vary by Amazon Region. The latest engine versions are supported in all Amazon Regions. To find the available engine versions in your Amazon Region, see Supported ElastiCache for Memcached versions.

Supported node types by Amazon Region

See Amazon ElastiCache pricing.

For a complete list of node types and specifications, see the following: