How I Cut Our Cloud Bill by 40% Without Changing a Single Line of Application Code

说明与用途

在3小时内通过删除未使用资源和调整实例大小，将AWS账单削减40%——无需更改代码。

问题

High AWS bill due to forgotten or underutilized resources and over-provisioned instances.

结果

Reduced monthly AWS spend from $4,200 to $2,520 by eliminating $863/month of orphaned resources and right‑sizing instances, achieving a 40% bill reduction.

工作流

• Identify orphaned resources with a Bash audit script
• List orphaned EIPs, unattached EBS volumes, old snapshots, stopped instances, idle load balancers, unused security groups
• Delete or deallocate identified resources
• Analyze running EC2 instances for CPU utilization over 14 days
• Recommend downsizing or keeping instances based on avg/max CPU thresholds
• Apply recommended instance type changes
• Re‑run audit to confirm savings

证据

After 3 hours of cleanup — no code changes, no architecture redesign — the bill dropped to $2,520/month.

来源

3 orphaned Elastic IPs ($108/month)

来源

14 unattached EBS volumes ($280/month)

来源