Fernando Simões

Software and infra person based in Portugal.

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Notes

A 40ms Go GC pause caused by swap Sep 13, 2026
1193 backends on WALWrite, and lore Jul 18, 2026
A Node.js heap mystery Mar 21, 2026
Investigating 108,725 forks Dec 11, 2025
Betting a coffee on a socket leak Aug 19, 2025
Sigterm a D state process Apr 8, 2025

I occasionally write random notes.