# Document history for Amazon Compute Optimizer
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The following table describes the documentation for this release of Amazon Compute Optimizer.
+ **API version:** 2019-11-30
+ **Latest documentation update:** August 15, 2022

The following table describes the documentation for this release of Compute Optimizer.

| Change | Description | Date | 
| --- |--- |--- |
| [Added FAQ page for supported protocols](#doc-history) | Added a new FAQ page with answers to common questions about the Amazon JSON and Smithy RPC v2 CBOR wire protocols. For more information, see [ FAQs on supported protocols](https://docs.amazonaws.cn/compute-optimizer/latest/ug/cbor-faq.html). | April 16, 2026 | 
| [Compute Optimizer generates commercial software license recommendations](#doc-history) | Compute Optimizer now generates license recommendations for commercial software that run on Amazon EC2. Compute Optimizer only provides Microsoft SQL Server license recommendations. For more information, see [ Viewing commercial software license recommendations](https://docs.amazonaws.cn/compute-optimizer/latest/ug/view-license-recommendations). | August 28, 2023 | 
| [Compute Optimizer generates new recommendations, and supports new EC2 instance types and Windows memory metrics](#doc-history) | Compute Optimizer now generates recommendations for Amazon ECS services running on Fargate. Compute Optimizer also provides recommendations for workloads running on Amazon Graviton-based instances and a wider range of EC2 instance types, including C5d, Im4gn, and Hpc6a. Additionally, Compute Optimizer now prioritizes the `Available MBytes` memory metric when generating recommendations for EC2 Windows instances. This update applies in the China (Beijing) and China (Ningxia) Amazon Web Services Regions. For more information, see [ Recommendations for Amazon ECS services on Fargate](https://docs.amazonaws.cn/compute-optimizer/latest/ug/view-ecs-recommendations), [Amazon Graviton-based instance recommendations](https://docs.amazonaws.cn/compute-optimizer/latest/ug/graviton-recommendations), [Amazon EC2 instance requirements](https://docs.amazonaws.cn/compute-optimizer/latest/ug/requirements.html#requirements-ec2-instances), and [ EC2 instance metrics](https://docs.amazonaws.cn/compute-optimizer/latest/ug/metrics.html#ec2-metrics-analyzed). | March 24, 2023 | 
| [Amazon EC2 instance recommendations enhancements](#doc-history) | Compute Optimizer now evaluates a wider range of instance metrics to generate recommendations. It also provides finding instance recommendations reasons and describes the platform differences between the current instance and the recommended instance type. This update applies in the China (Beijing) and China (Ningxia) Amazon Web Services Regions. For more information, see [EC2 instance metrics](https://docs.amazonaws.cn/compute-optimizer/latest/ug/metrics.html#ec2-metrics-analyzed), [Finding reasons](https://docs.amazonaws.cn/compute-optimizer/latest/ug/view-ec2-recommendations.html#ec2-finding-reasons), and [Platform differences](https://docs.amazonaws.cn/compute-optimizer/latest/ug/view-ec2-recommendations.html#ec2-platform-differences). | April 7, 2022 | 
| [Amazon Graviton based instance recommendations](#doc-history) | Compute Optimizer now provides the price and performance impact for running your workload on Amazon Graviton based instances. For more information, see [Amazon Graviton-based instance recommendations](https://docs.amazonaws.cn/compute-optimizer/latest/ug/view-ec2-recommendations.html#ec2-graviton-recommendations). If your account is your organization's management account, you can now also view the member accounts of an organization that are opted in to Compute Optimizer. For more information, see [Viewing the accounts opted in to Amazon Compute Optimizer](https://docs.amazonaws.cn/compute-optimizer/latest/ug/viewing-accounts.html). | August 26, 2021 | 
| [Recommendations export for Amazon EBS volumes and Lambda functions](#doc-history) | You can now export recommendations for Amazon EBS volumes and Lambda functions to Amazon S3. For more information, see [Exporting recommendations](https://docs.amazonaws.cn/compute-optimizer/latest/ug/exporting-recommendations.html). | May 18, 2021 | 
| [Adding documentation for Amazon managed policies](#doc-history) | Compute Optimizer now tracks changes for its Amazon managed policies. For more information, see [Amazon managed policies for Amazon Compute Optimizer](https://docs.amazonaws.cn/compute-optimizer/latest/ug/managed-policies.html). | May 18, 2021 |