📰 2026-04-30 01:00 更新
🔸 Linux 7.0 Broke PostgreSQL: The Preemption Regression Explained / Linux 7.0破坏PostgreSQL ：抢占回归解释
🔗 Linux 7.0 Broke PostgreSQL: The Preemption Regression Explained
🔥 43 points
原文:
☕ Welcome to The Coder Cafe! On April 3, 2026, Salvatore Dipietro, an engineer at AWS, posted a patch to the Linux kernel mailing list. The reason: on a 96-vCPU Graviton4 machine running Linux 7.0, PostgreSQL throughput had dropped to roughly half of what it produced on Linux 6.x. In this post, we will trace what changed in Linux 7.0, how PostgreSQL manages memory, and what role memory pages play in making the problem appear (or disappear). Get cozy, grab a coffee, and let’s begin!Salvatore D…
译文:
☕ 欢迎来到The Coder Cafe ！ 2026年4月3日， AWS工程师Salvatore Dipietro在Linux内核邮件列表中发布了一个补丁。原因是：在运行Linux 7.0的96个vCPU的Graviton4机器上， PostgreSQL的吞吐量已经下降到Linux 6.x的一半左右。在本文中，我们将跟踪Linux 7.0中的更改， PostgreSQL如何管理内存，以及内存页面在使问题出现（或消失）方面发挥的作用。Get c ozy ，喝杯咖啡，我们开始吧！ Salvatore D…
自动更新 · 正文抓取 · 双语翻译