Amazon ECS Cost Optimization
ECS costs depend on whether you use EC2 or Fargate launch type. Fargate charges per vCPU and memory per second, making oversized task definitions expensive at scale. EC2 launch type inherits all the EC2 cost issues. In both cases, teams over-provision CPU and memory in task definitions as a safety margin.
Common ECS cost waste patterns
Oversized Fargate task definitions
Task definitions requesting more vCPU and memory than containers actually use. Fargate charges per-second for allocated resources whether used or not.
Running too many tasks
Auto-scaling minimums set too high or services running more tasks than needed for current traffic. Each unnecessary task is a direct cost.
Not using Fargate Spot
Workloads that can tolerate interruptions (batch jobs, dev environments) running on regular Fargate instead of Fargate Spot at up to 70% discount.
How to reduce your ECS costs
Rightsize Fargate task definitions
Save 20-40% mediumUse Container Insights to see actual CPU and memory utilization per task. Reduce task definition resources to match peak usage with a 20-30% buffer.
Tune auto-scaling minimums
Save 20-50% easyReview minimum task count in your auto-scaling configuration. If your service runs 10 tasks minimum but traffic only needs 4 during off-peak, lower the minimum.
Use Fargate Spot for suitable workloads
Save 50-70% mediumDev environments, batch processing, and CI/CD tasks are good candidates for Fargate Spot. Mix regular and Spot capacity providers for production.
Consider Graviton (ARM) tasks
Save 20% mediumFargate tasks on ARM64 architecture are 20% cheaper than x86. Most containerized applications run without modification on ARM.
How ZapStack finds ECS waste
ZapStack automatically scans your AWS environment and surfaces ECS cost savings you can action immediately.
- Detects oversized Fargate task definitions
- Identifies services with excess running tasks
- Flags workloads suitable for Fargate Spot
- Recommends Graviton migration for cost reduction
- Calculates per-service savings from rightsizing
Frequently asked questions about ECS costs
Related AWS services
EC2 Cost Optimization
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ELB Cost Optimization
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CloudWatch Cost Optimization
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