# Consistency Lag

> The degree to which replicas trail the primary, so reads served from them may return stale data.

Record: `lexicon:consistency-lag`
Kind: quality-attribute
Layer: [Correctness Core](https://banes-lab.com/records/layer/correctness-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-consistency-lag

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Replication or Alternate Capacity](https://banes-lab.com/records/lexicon/replication-or-alternate-capacity.md) and before [Consistency Policy](https://banes-lab.com/records/lexicon/consistency-policy.md).

## Category

- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/records/lexicon-category/self-healing-recovery-deployment-safety.md)

## In tension with

- [Replication](https://banes-lab.com/records/architecture/replication.md)
- [Replication / Consistency Lag](https://banes-lab.com/records/tension/consistency-lag-replication.md)

## Linked from

- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/ontology/principles/architecture-category-self-healing-recovery-deployment-safety.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)