OFICIAL AWS What's New

Amazon ElastiCache now supports Graviton4-based M8g, R8g, and C8gn nodes

What happened
Based on AWS What's New · Aug 06, 2026

Amazon ElastiCache now offers Graviton4-based M8g, R8g, and C8gn nodes for Valkey and Memcached, delivering up to 47% higher throughput and 43% lower latency compared to Graviton3-based nodes.

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Key points
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Amazon ElastiCache now supports Graviton4-based M8g, R8g, and C8gn node families for Valkey and Memcached.
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Graviton4-based nodes also offer more memory per node compared to equivalent Graviton3-based nodes.
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As an example, an m8g.8xlarge provides 124.65 GiB versus 103.68 GiB on m7g.8xlarge, up to 20% more memory at the same node size.
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C8gn nodes offer up to 200 Gbps of network bandwidth, enabling you to scale performance and throughput while optimizing the cost of running network-intensive workloads.
Key numbers
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These nodes provide performance improvements such as up to 47% higher throughput and up to 43% lower P99 latency compared to equivalent Graviton3-based nodes, depending on configuration.
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The upgrade also includes up to 31% better price-performance for on-demand pricing and increased memory per node.
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8xlarge node offers 124.

Amazon Web Services (AWS) has introduced Graviton4-based node families—M8g, R8g, and C8gn—for Amazon ElastiCache, supporting Valkey and Memcached engines. These nodes provide performance improvements such as up to 47% higher throughput and up to 43% lower P99 latency compared to equivalent Graviton3-based nodes, depending on configuration. The upgrade also includes up to 31% better price-performance for on-demand pricing and increased memory per node. For example, an m8g.8xlarge node offers 124.65 GiB of memory, compared to 103.68 GiB on an m7g.8xlarge, representing a 20% increase at the same size.

The new C8gn nodes deliver up to 200 Gbps of network bandwidth, enabling enhanced scalability for network-intensive workloads while optimizing cost efficiency. All M8g, R8g, and C8gn nodes are available in sizes ranging from large to 16xlarge across over 30 AWS Regions, including AWS GovCloud (US) and China Regions. Customers can deploy these nodes by creating new clusters or modifying existing ones via the AWS Management Console, AWS SDK, or AWS CLI.

AWS states that the performance gains are based on internal testing and may vary depending on workload and configuration. The company recommends reviewing the Amazon ElastiCache pricing page for detailed regional availability and pricing information before deployment. The new node families are designed to support a wide range of use cases, from caching to real-time data processing.

To assist users in adopting the new nodes, AWS provides documentation in the Amazon ElastiCache User Guide and supports integration with AI coding agents through Agent tools for ElastiCache. Customers are encouraged to evaluate the new node families to determine suitability for their specific performance and cost requirements.

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