Fernando Simões

Notes

Experiments, production issues, occasional kernel and database findings.

io_uring without readahead - Aug 31, 2026
Reads vs writes under pressure - Jul 18, 2026
Where did 400 MiB go? - Mar 21, 2026
Sigterm a D state process - Apr 8, 2025
Beep boop beep - Oct 30, 2024

Misc

Papers, blog posts and videos I liked the most

Hänsel und Gretel plaque at the Bosque Alemão (German Woods) in Curitiba

My son's custom Lego build — My son's custom Lego build: mad scientist and robot headed to outer space. Yes, the stairs are there just in case