AWS Cost Optimization Case Study: E-commerce Client

The Challenge

A fast-growing e-commerce company came to ZenoCloud with a common problem: their AWS bills were spiraling out of control. Despite their best efforts to optimize, infrastructure costs were growing faster than their revenue.

Key Pain Points

• Unpredictable monthly AWS costs with frequent overages
• Oversized EC2 instances running 24/7
• No clear visibility into cost allocation
• Performance issues during peak traffic despite high spending

The Solution

Our team conducted a comprehensive AWS infrastructure audit and implemented a multi-pronged optimization strategy:

1. Right-Sizing Instances

We analyzed CPU, memory, and network utilization across all instances and found that a large share were oversized. By right-sizing to appropriate instance types, we cut waste immediately without impacting performance.

2. Reserved Instances & Savings Plans

For predictable workloads, we implemented a mix of Reserved Instances and Savings Plans, securing meaningful discounts compared to on-demand pricing.

3. Auto-Scaling Implementation

We configured intelligent auto-scaling that automatically adjusts capacity based on actual demand, eliminating the need for over-provisioning.

4. Storage Optimization

• Implemented S3 lifecycle policies to move old data to cheaper storage tiers
• Cleaned up unused EBS volumes and snapshots
• Optimized database storage with proper indexing

5. CDN & Caching

By implementing CloudFront CDN and ElastiCache, we took significant load off the origin servers, decreasing compute costs while improving response times.

The Results

• A materially lower monthly bill — right-sizing, commitment discounts, and storage cleanup all compounded
• Faster, more consistent performance — caching and CDN meant peak traffic no longer strained the origin
• Predictable costs — clear allocation and no more surprise overages

Key Takeaways

• Regular infrastructure audits are essential for cost control
• Right-sizing is often the quickest path to savings
• Combining multiple optimization strategies yields the best results
• Improved architecture often delivers both cost savings and better performance

Ready to optimize your AWS costs? Contact ZenoCloud for a free infrastructure assessment.