Tutorial: View compute resource memory
You can view how much memory a compute resource registers with in the Amazon ECS console or with the DescribeContainerInstances API operation. If you're trying to maximize your resource utilization by providing your jobs as much memory as possible for a particular instance type, you can observe the memory available for that compute resource and then assign your jobs that much memory.
To view compute resource memory
Open the console at https://console.aws.amazon.com/ecs/v2
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Choose Clusters, and then choose the cluster that hosts your compute resources to view.
The cluster name for your compute environment begins with your compute environment name.
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Choose Infrastructure.
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Under Container instances, choose the container instance.
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The Resources and networking section shows the registered and available memory for the compute resource.
The Registered memory value is what the compute resource registered with Amazon ECS when it was first launched, and the Available memory value is what hasn't already been allocated to jobs.