Cost Optimization - Tag - AWS Senseihttps://aws-sensei.cloud/tags/cost-optimization/Cost Optimization - Tag - AWS SenseiHugo -- gohugo.ioenThu, 28 May 2026 00:00:00 +0200From 900,000 to 3: Drastically Reducing S3 Costs with Incremental Cachinghttps://aws-sensei.cloud/posts/2026-05-28-analytics-cost-optimization/Thu, 28 May 2026 00:00:00 +0200Marcelhttps://aws-sensei.cloud/posts/2026-05-28-analytics-cost-optimization/🔊 Voiced by Amazon Polly $4.64 in two days. For a blog with modest traffic, that’s an unexpected surprise in the AWS Cost Explorer. The culprit was easy to find — but the fix took three iterations worth writing down. The Problem My analytics system is built on Kinesis Firehose → S3 → Athena. A scheduled Lambda runs every hour, queries Athena, and writes the result as JSON to S3 where the dashboard reads it.