How do I set up the CPUs from AWS console for my EC2 instance?

I have an Amazon Web Server (AWS) elastic IP (EC2) Window 2016 server. Can you please explain how I can view the CPU set up and be able to change it from the AWS console?

I know I currently have 8 CPUs set up but I would like to be able to reduce it to 4 then increase it when needed.
mike99cAsked:
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Shaun VermaakTechnical SpecialistCommented:
I would screenshot you the steps by my AWS expired (I primarily use Azure).

Here is the steps though
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-resize.html
Dariusz TykaICT Infrastructure Specialist Senior Commented:
When you log in to AWS console and go to EC2-->Isnatnces you'll have list of instances. In column instance type you can see types of your instances like m3.medium, r2.large etc.
Instance_type.PNGTo know what those names mean (how many CPUs, memory) go here:
https://aws.amazon.com/ec2/instance-types/
If you want to change assignment you'll need to power down your instance and change its type to different one. Pick one from link I mentioned above that best suits you.
Be aware of T2 instances - burstable performance instances. More info here:
https://aws.amazon.com/ec2/instance-types/#burst
How to change instance type: Left click on instance-->Instance settings-->Change instance type.
ec2_instance_type.PNG

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mike99cAuthor Commented:
So am I right in thinking that you don't actually select the number of CPUs but rather the instance type which has CPUs assigned to it?
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Dariusz TykaICT Infrastructure Specialist Senior Commented:
Yes that's correct.
mike99cAuthor Commented:
AWS instance optionsOK I managed to get to the listing of instances and can see that I have t2.2xlarge which equates to the 8 CPUs.

However I can't see a Change Instance Type but instead there is an Actions button at the top and then nearest I have is:

Actions > Instance Settings > Change T2 Unlimited

Could this be it?

Also it looks like I have maxed out on the T2 model. Does this mean if I wanted more CPUs I will need to select an instance other than T2 such as M5?
Dariusz TykaICT Infrastructure Specialist Senior Commented:
I see that change instance type is greyed out, so I suspect your instance may not be powered off. You need power it down before change. Also you can change to any available instance type listed on the pull down list. So it may be m3, m5 or others.
mike99cAuthor Commented:
In order to power off, do I need to change the Instance State to Off?
Dariusz TykaICT Infrastructure Specialist Senior Commented:
Yes. Or you can initiate system shutdown from VM itself.
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