# Single-Primary Read Contention

> Serving all reads from the single primary, so read load contends with writes and limits throughput.

Record: `lexicon:single-primary-read-contention`
Kind: anti-pattern
Layer: [Performance Core](https://banes-lab.com/records/layer/performance-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-single-primary-read-contention

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Single Target Routing](https://banes-lab.com/records/lexicon/single-target-routing.md) and before [Unbounded Access](https://banes-lab.com/records/lexicon/unbounded-access.md).

## Category

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

## Negated by

- [Read Replica](https://banes-lab.com/records/architecture/read-replica.md)

## Linked from

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