Graviton Migration Guide: How to Cut Your EC2 and RDS Costs Step by Step

Many teams run the same instance types for years without checking whether something cheaper and faster exists. AWS Graviton processors are one of the easiest places to look. They are AWS’s own Arm-based chips, and AWS positions them as delivering better price-performance than comparable x86 instances. This guide walks you through a safe, step-by-step migration for EC2 and RDS.

What Is Graviton and Why Does It Save Money?

Graviton instances are priced lower than similar x86 instances in most cases, and many workloads run as fast or faster on them. Lower hourly cost plus equal or better performance means you can often do the same work for less, or handle more traffic on the same budget. It is a core part of aws cost optimization because it saves money without reducing capacity.

Savings vary by workload, instance family and region, so always test with your own application.

Step 1: Check What Can Move

Start by listing your instances and what runs on them. Good first candidates include:

• Web and API servers
• Containerized microservices
• Open-source databases such as MySQL, PostgreSQL and MariaDB on RDS
• Caching layers and batch jobs

Harder cases include software that only ships x86 binaries, older proprietary tools and anything relying on x86-specific libraries.

Step 2: Check Compatibility

Arm uses a different architecture, so confirm your stack supports it.

• Operating system: Use an Arm64 build of Amazon Linux, Ubuntu or another supported distro.
• Languages: Java, Python, Node.js, Go, .NET and others generally run well on Arm, but check your versions.
• Dependencies: Review native libraries and third-party agents for Arm64 support.
• Containers: Build multi-architecture images, or Arm64 images, for Docker and ECS or EKS.

Step 3: Pick the Right Graviton Instance

Match the family to the workload, as you would with any rightsizing exercise.

• General purpose: Balanced web and application servers
• Compute optimized: CPU-heavy tasks
• Memory optimized: Databases and in-memory caches

Use AWS Compute Optimizer to confirm you are not simply moving an oversized instance to a new architecture. Rightsize first or at the same time, because that stacks the savings.

Step 4: Test in a Non-Production Environment

Never migrate production first.

1. Launch a Graviton instance in staging.
2. Deploy the same application and configuration.
3. Run functional tests, load tests and your usual monitoring.
4. Compare latency, throughput, error rates and cost against the current setup.

Record the results so you can justify the change to your team.

Step 5: Migrate EC2 Gradually

Use a gradual rollout instead of switching everything at once.

• Add Graviton instances to an Auto Scaling group alongside x86 instances.
• Shift a small share of traffic first, then increase it.
• Watch metrics closely for errors and performance changes.
• Remove x86 instances only when results are stable.

Keep a rollback plan so you can return to x86 quickly if something fails.

Step 6: Migrate RDS Safely

For RDS, the main change is the instance class.

1. Take a snapshot or confirm automated backups are current.
2. Test first by restoring the snapshot to a Graviton-based instance in staging.
3. Check engine and version support for Graviton on your database engine.
4. Schedule a maintenance window, since changing instance class can cause a short outage.
5. Modify the instance class and monitor performance afterward.

For high availability setups, test the failover behavior as part of your plan.

Step 7: Lock In the Savings

After migration, make the savings durable:

• Review Savings Plans or Reserved Instances coverage, since commitments may need updating for new instance families.
• Use Cost Explorer with tags to compare before and after spend.
• Update your infrastructure-as-code templates so new resources default to Graviton.

Common Mistakes to Avoid

• Migrating without testing dependencies
• Moving oversized instances without rightsizing
• Forgetting to update commitments and templates
• Switching all workloads at once

Final Thoughts

Graviton migration is a practical, repeatable win. Start with low-risk workloads, test carefully, roll out gradually and measure the results. Treat it as one part of a wider aws cost optimization routine that includes rightsizing, commitments, tagging and regular reviews, and your EC2 and RDS costs will keep falling without sacrificing performance.