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How do you monitor auto scaling on AWS CloudFormation?

StackOverflow https://stackoverflow.com/questions/14276222

Question

I setup a quick web app using the Visual Studio Toolkit and deployed it to CloudFormation with the default settings. I then started to load the app using JMeter until eventually it stopped returning 200 statuses.

From what I can see no auto scaling has occurred - ie: no duplicate instances have been started up. Is this something that needs to be configured manually in CloudWatch with an alarm based on CPU usage or is CloudFormation handling this for me?

Solution

Right I made a mistake - after further testing I found that the load balancer did scale after it hit a certain threshold of kb out per second. I think the issue was that I hit it way to hard initially and it just tanked before it had a chance to scale.

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