Writing
Insights
What we have learned building and running production systems — written down so it is useful to somebody other than us.
- PostgreSQL
- Observability
- Latency
The p99 that was a cron job
For three weeks one endpoint’s p99 went to nine seconds every night at 02:10 and recovered on its own by 02:40. Nobody was awake to see it and the dashboard averaged it away. The fix was one word of SQL; the finding was the three weeks.
3 min read
- WebRTC
- TURN
What actually connects: TURN, and the networks that fight it
Every WebRTC tutorial ends at “and then ICE finds a path”. On the networks our users are actually on, it often does not. Three years of running a meetings product here, and the co…
3 min read
- SQLite
- Operations
SQLite in production, on purpose
We run several real sites on a single SQLite file, and we would do it again — but not for the reasons people usually give, and not without the four things that make it survivable.…
3 min read
Have something to build?
Tell us what you are working on. We will tell you honestly whether we are the right team for it.
or email us at hello@larsima.com