# Invalidation Policy

> The rules determining when cached entries are considered stale and must be refreshed or evicted.

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

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Input Size Model](https://banes-lab.com/records/lexicon/input-size-model.md) and before [Load Model](https://banes-lab.com/records/lexicon/load-model.md).

## Category

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

## Required by

- [Caching](https://banes-lab.com/records/architecture/caching.md)

## Linked from

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