> For the complete documentation index, see [llms.txt](https://huy312100.gitbook.io/software-development/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://huy312100.gitbook.io/software-development/cloud-service/aws/certificate/clf-c02/aws-architecting-and-ecosystem/aws-right-sizing.md).

# AWS Right Sizing

* EC2 has many instance types, but choosing the most powerful instance type isn’t the

  best choice, because the cloud is elastic
* Right sizing is the process of matching instance types and sizes to your workload

  performance and capacity requirements at the lowest possible cost
* Scaling up is easy so always start small
* It’s also the process of looking at deployed instances and identifying opportunities to eliminate or downsize without compromising capacity or other requirements, which results in lower costs
* It’s important to Right Size...
  * before a Cloud Migration
  * continuously after the cloud onboarding process (requirements change over time)
* CloudWatch, Cost Explorer, Trusted Advisor, 3rd party tools can help