AWS Auto Scaling
User Guide

What Is AWS Auto Scaling?

AWS Auto Scaling enables you to quickly discover the scalable AWS resources that are part of your application and configure dynamic scaling in a matter of minutes. The AWS Auto Scaling console provides a single user interface to use the automatic scaling features of multiple AWS services. It also offers recommendations to configure scaling for the scalable resources in your application.

For more information about the benefits of this service, see the AWS Auto Scaling FAQs.

Scalable Resources

Use AWS Auto Scaling to automatically scale the following resources that support your application:

  • Amazon EC2 Auto Scaling groups

  • Aurora DB clusters

  • DynamoDB global secondary indexes

  • DynamoDB tables

  • ECS services

  • Spot Fleet requests

How AWS Auto Scaling Works

With AWS Auto Scaling, you create a scaling plan with a set of instructions used to configure dynamic scaling for the scalable resources in your application. AWS Auto Scaling creates target tracking policies for the scalable resources. Target tracking policies add and remove capacity for each resource as required to maintain resource utilization at the specified target value. AWS Auto Scaling offers recommendations for target tracking scaling policies based on the most popular scaling metrics and thresholds used for automatic scaling.

You create one scaling plan per application source (an AWS CloudFormation stack or a set of tags) and choose a scaling strategy for each type of scalable resource in your application. You can choose to prioritize application availability, cost optimization, or a combination of the two.

After you have selected an appropriate strategy for each resource type, you are directed to a screen where you can customize the scaling plan according to your needs. The default settings can vary depending on the selected resource and resource type. The default settings should be optimal in most cases.

How to Get Started

To get started, create a scaling plan. For more information, see Getting Started with AWS Auto Scaling.

To see the regional availability for AWS Auto Scaling, see the AWS Region Table.

To learn more about AWS CloudFormation, see the AWS CloudFormation User Guide.

For more information on scaling your fleet of Amazon EC2 instances, see the Amazon EC2 Auto Scaling User Guide.

For more information on automatic scaling for resources beyond EC2, see the Application Auto Scaling User Guide.