Fernando Simões
Welcome! I’m Fernando, a platform engineer working in message attribution. This is where I share debugging stories and other explorations into kernels, databases, runtimes, and performance. More about me, or reach me at frn@frn.sh.
Posts
Most of these are me trying to understand something that caught my interest, or to reproduce a production incident in a more controlled environment.
- Breaking what a program is
- What /proc sees in 19 MiB
- Where did 400 MiB go?
- The layers between select and disk
- 108,725 forks
- Sigterm a D state process
- The cost of not measuring
- Builtins and source
Notes
Shorter pieces on computers and their history.