AWS engineer Salvatore Dipietro discovered a 50% PostgreSQL throughput regression on Linux 7.0, traced to the kernel's removal of PREEMPT_NONE and its interaction with spinlock-based buffer pool management.
Infrastructure
Linux 7.0 Broke PostgreSQL: The Preemption Regression Explained
A 50% PostgreSQL performance cliff on Linux 7.0: AWS engineer traces the regression to the kernel's removal of PREEMPT_NONE and its clash with spinlock-based buffer management.
Wednesday, April 29, 2026 12:00 PM UTC2 MIN READSOURCE: Hacker NewsBY sys://pipeline
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