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Updated: 18/7/25, 7:16 AM

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Calculators
ECS EC2 Calculator

Calculate optimal EC2 instances for your ECS containers

Configuration

1.0 = no oversubscription, 1.2 = 20% more containers

Results
3
Total Instances
1
Instances per AZ
95.2%
Container Utilization
98.0%
Memory Utilization
Instance Capacity
Containers per instance:7
Limiting factor:CPU
Instance vCPU:2
Instance Memory:4.0GB
Memory Analysis
Oversubscription ratio:1.2x
Containers by CPU:7
Containers by memory (soft):8
Containers by memory (hard):6
Memory oversubscribed - monitor usage!
Container Distribution
Requested containers:10
With siblings:20
Total capacity:21
Spare capacity:1
High Availability
Availability zones:3
Instances per AZ:1
Sibling containers:Enabled
Good container utilization (95.2%). This configuration efficiently uses your instances.
High memory oversubscription (98.0% with 1.2x ratio). Monitor container memory usage closely to avoid OOM kills.
Sibling containers enabled. Each container will have a replica in a different AZ for high availability.