Introducing DBArena: open, reproducible benchmarks for hosted Postgres

DBArena is a Supabase-sponsored website publishing reproducible benchmarks of hosted PostgreSQL services, initially comparing Supabase Postgres with default storage and OrioleDB, Amazon RDS for PostgreSQL, and Google Cloud SQL for PostgreSQL across up to seven compute tiers. It measures throughput, price-performance, and p95 latency using a TPC-C-derived workload under cache-fitting and disk-intensive scenarios, with providers matched by vCPU count and I/O configuration while retaining default database settings. Tests use PostgreSQL 17, direct TLS connections, 30-minute warmups, 60-minute measurement periods, concurrency sweeps to identify peak throughput, and three successful fresh-environment runs whose median is published. Results include raw data, configurations, commands, metadata, and open-source tooling to enable independent reruns, with the first release containing 62 results from more than 750 runs conducted between September 25 and October 1, 2026. The project notes limitations including its single maximum-throughput workload, one tested region per cloud, list-price cost comparisons, vCPU-based matching rather than memory matching, and differing load-generator placement options among providers.

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