# Cache Invalidation

> The activity of removing or refreshing cached entries so stale data is not served.

Record: `lexicon:cache-invalidation`
Kind: activity
Layer: [Performance Core](https://banes-lab.com/records/layer/performance-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-cache-invalidation

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Always-Fresh Reads](https://banes-lab.com/records/lexicon/always-fresh-reads.md) and before [Constant-Factor Practicality](https://banes-lab.com/records/lexicon/constant-factor-practicality.md).

## Category

- [Scalability / Performance / Optimization](https://banes-lab.com/records/lexicon-category/scalability-performance-optimization.md)

## In tension with

- [CDN / Edge Caching](https://banes-lab.com/records/architecture/cdn-edge-caching.md)
- [CDN / Edge Caching / Cache Invalidation](https://banes-lab.com/records/tension/cache-invalidation-cdn-edge-caching.md)

## Linked from

- [Scalability / Performance / Optimization](https://banes-lab.com/ontology/principles/architecture-category-scalability-performance-optimization.md)
- [Infrastructure Concerns](https://banes-lab.com/ontology/lexicon/lexicon-category-infrastructure-concerns.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)