Glossary term
What is Kill switch / Feature flag? Meaning for developers
A switch to turn a feature on/off without deploying. Example: Disable a broken feature instantly.
Learn it properly · System DesignLesson 44: Graceful Degradation & Load SheddingAt 5× your planned peak, trying to serve everyone means serving no one. How to fail partially and on purpose: rank features and switch off the optional ones, reject excess work early and cheaply, shed by priority, and use waiting rooms for spikes you can see coming.