39 long-form articles on production engineering — how real systems fail, why, and what actually fixed them.
8 articles matching “Concurrency”
Scaling & Infra20 min read
Not a "what is Lambda" post. A deep dive into how Lambda actually works: Firecracker microVMs and the Worker/placement fleet, how invocations get routed on the warm vs cold path, and what the INIT phase really does (and…
Schema Design12 min read
Why DELETE is the most expensive DML operation in a relational database — and why a simple UPDATE SET deleted_at = NOW() is 4-8x faster under concurrent load.
WebSockets & Real-time4 min read
A production case study — how a small config issue brought down an entire IoT device fleet and what fixed it.
Query Optimization13 min read
“We sold 3 tickets but only had 1.” The code is inside a transaction, looks right, works a hundred times locally, and only breaks in production under load.
Query Optimization18 min read
Every team ships with the same lie: throw everything on the database and it'll handle correctness. Works at 50 writes/sec.
Architecture Decisions20 min read
A beginner-friendly walkthrough: what “concurrent” means, what the C10K and C10M problems actually are, how the industry usually fixes them (event loops vs whole-system design), and what still goes wrong in production —…
Scaling & Infra22 min read
Not a "what is serverless" post. The stuff you learn after the demo, from someone who's run it at scale.
Architecture Decisions16 min read
"Stamp each write with the current time and keep the latest" feels obvious — and it silently deletes data, because two machines can never agree on what time it is.