# Resource Headroom

> The degree of spare capacity remaining on a machine before its resource ceiling is reached.

Record: `lex:resource-headroom`
Kind: quality-attribute
Layer: [Performance Core](https://banes-lab.com/records/layer/performance-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lex-resource-headroom

## category

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

## referenced-by

- [Vertical Scaling](https://banes-lab.com/records/arch/vertical-scaling.md)