# Arrival and Service Rates

> The measured rates at which requests arrive and at which a server completes them, the inputs a queuing model needs.

Record: `lex:arrival-and-service-rates`
Kind: metric
Layer: [Performance Core](https://banes-lab.com/records/layer/performance-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lex-arrival-and-service-rates

## category

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

## referenced-by

- [Queuing Theory](https://banes-lab.com/records/arch/queuing-theory.md)