
🐧 Linux 7.0 broke PostgreSQL
Great deep dive into preemption, page faults and TLBs
• A tiny scheduler change + spinlocks + 4KB pages + 120GB shared_buffers = 50% throughput drop
• 55% of CPU was burning in one PostgreSQL spinlock
read.thecoder.cafe/p/linux-broke-…
#linux #postgresql
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