Programming
Apr 5, 2026Hacker News
Linux 7.0 Halves PostgreSQL Performance: A Kernel Preemption Deep Dive
An AWS engineer reported a dramatic 50% performance drop for PostgreSQL on the upcoming Linux 7.0 kernel, caused by changes to kernel preemption modes. While a revert was proposed, kernel developers suggest PostgreSQL should adapt using Restartable Sequences (RSEQ). This could mean significant performance issues for databases on Linux 7.0 until PostgreSQL is updated.
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