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Unlocking Performance: Amazon EC2 C9g and C9gd Instances with Graviton5

5 min read AWS BlogJun 30, 2026Reviewed for accuracy
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PractitionerHands-on experience recommended

The introduction of C9g and C9gd instances addresses the growing demand for high-performance computing in the cloud. Powered by AWS Graviton5 processors, these instances offer significant improvements over their predecessors, particularly in performance and efficiency. They are designed for compute-intensive workloads, making them ideal for applications that require rapid processing and high throughput.

C9g instances deliver up to 25% higher performance per vCPU compared to the previous-generation C8g instances. On the other hand, C9gd instances include local NVMe SSD storage, providing up to 30% higher storage performance than earlier local storage options. Both instance types leverage the Nitro Isolation Engine, which enhances instance isolation with mathematical precision. This ensures that your workloads run securely and efficiently. Additionally, the instances support detailed performance statistics, offering high-resolution I/O metrics accessible via Amazon CloudWatch or nvme-cli at no extra cost. You can also adjust the Instance Bandwidth Configuration (IBC) to optimize bandwidth allocation between Amazon EBS and Amazon VPC networking by up to 25%.

In production, these instances can significantly boost your application's performance, especially for workloads that are sensitive to latency and require fast data access. However, keep an eye on your specific workload requirements and test thoroughly, as the benefits can vary based on the nature of your applications and their architecture.

Key takeaways

  • Leverage C9g instances for up to 25% higher performance per vCPU.
  • Utilize C9gd instances for enhanced local NVMe SSD storage performance.
  • Adjust Instance Bandwidth Configuration (IBC) for optimal EBS and VPC networking.
  • Monitor detailed performance statistics via Amazon CloudWatch or nvme-cli.
  • Take advantage of the Nitro Isolation Engine for improved security and efficiency.

Why it matters

These instances can dramatically enhance the performance of compute-intensive applications, leading to faster processing times and improved user experiences. The ability to fine-tune bandwidth allocation further optimizes resource usage in production environments.

When NOT to use this

The official docs don't call out specific anti-patterns here. Use your judgment based on your scale and requirements.

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