Airbnb Engineering: replay real DB traffic instead of trusting synthetic benchmarks
rseroter · x · 2026-10-07
Airbnb Engineering published a post on database performance evaluation: instead of synthetic benchmarks, which only measure the workload you imagined, they replay real production traffic to see how a database handles the workload they actually have.
The core argument: synthetic benchmarks reflect the assumptions of their designers, while real-traffic replay exposes actual access patterns, hotspots, and long-tail queries—making it a far better tool for capacity planning and database selection.
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