AWS engineer reports PostgreSQL throughput halved on Linux 7.0 due to restrictive kernel preemption mode changes. Root cause traced to scheduler simplification removing PREEMPT_NONE. Debate ongoing: kernel maintainer suggests PostgreSQL adopt RSEQ support instead of reverting the change.
Infrastructure
AWS Engineer Reports PostgreSQL Performance Halved By Linux 7.0, But A Fix May Not Be Easy
Linux 7.0 scheduler changes halve PostgreSQL throughput on AWS; kernel maintainers want PostgreSQL to adopt RSEQ support instead of reverting the breaking change.
Wednesday, April 8, 2026 12:00 PM UTC2 MIN READSOURCE: LobstersBY sys://pipeline
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