Production Lessons – What Broke and Why

Real production incidents. Real architectural mistakes. Real system design lessons from scaling backend systems.

Episode #1
Redis Is Fast — Until You Design It Wrong
How 30,000 users and a single hot key exposed a flawed Redis data modeling decision during peak traffic.
Episode #2
When Retry Made Our System Worse
How a naive retry policy on cache invalidation led to cascading failures in production.
Episode #3
When a Read Query Blocked a Write-Heavy System — Lessons on Isolation Levels
A real production incident where a full-table read blocked writes in a 20k+ inserts/day system. Deep dive into READ UNCOMMITTED, Snapshot Isolation, indexing trade-offs, and architectural decisions.