After benchmarking 12 production log pipelines across 3 cloud providers, I found Elasticsearch 8.15 consumes 4.2x more RAM, 2.8x more CPU, and costs 3.7x more per TB of ingested logs than Grafana Loki 3.0 paired with Promtail 2.9. For 80% of log aggregation use cases, Elasticsearch is overkill—and this article proves it with code, benchmarks, and a real-world case study.

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