--- title: I Tried to Prove That SQL Server Is Slower on Linux. I... description: A rigorous benchmark comparing SQL Server 2025 performance on RHEL 10.1 versus Windows Server 2025 using a financial payments workload with 2,500 concurrent... canonical: https://daily.dev/posts/i-tried-to-prove-that-sql-server-is-slower-on-linux-i-failed-miserably--xmdmawhcc twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: I Tried to Prove That SQL Server Is Slower on Linux. I Failed Miserably. | daily.dev og:description: A rigorous benchmark comparing SQL Server 2025 performance on RHEL 10.1 versus Windows Server 2025 using a financial payments workload with 2,500 concurrent... og:url: https://daily.dev/posts/i-tried-to-prove-that-sql-server-is-slower-on-linux-i-failed-miserably--xmdmawhcc og:image: https://api.daily.dev/og/posts/xMDmAWHcC.png og:image:alt: I Tried to Prove That SQL Server Is Slower on Linux. I Failed Miserably. og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # I Tried to Prove That SQL Server Is Slower on Linux. I Failed Miserably. **[ITNEXT](https://daily.dev/sources/itnext)** · 16 min read · 0 upvotes · 0 comments ## Summary A rigorous benchmark comparing SQL Server 2025 performance on RHEL 10.1 versus Windows Server 2025 using a financial payments workload with 2,500 concurrent virtual users. The test deliberately induced severe lock contention via serializable idempotency checks on a UUID index, generating over 160 million milliseconds of LCK_M_RS_U range lock waits. Linux matched and marginally outperformed Windows (3.3% higher throughput, 9% lower p95 latency) despite 20% higher WRITELOG overhead, suggesting the Linux CFS scheduler drains lock queues slightly more efficiently. A critical methodological lesson emerged: a noisy neighbour cloud artefact initially produced a false 66% improvement signal, underscoring the need to re-validate cloud benchmarks across multiple independent VM deployments and to verify SQL Server build parity (GDR vs CU branch) before comparing platforms. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [A Clanker Pitted Fedora Against Windows 11. 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