**Source URL:** https://general.veevavault.dev/custom-pages/references/limits.md

# Limits and Restrictions

Vault Custom Pages has certain technical limits and restrictions that developers should be aware of when building applications. These limits help ensure system stability and optimal performance.

The following tables and notes outline the key limitations for Custom Pages development and deployment. Understanding these constraints will help you design your applications appropriately.

## Resource Limits {#resource-limits}

| Resource | Limit |
| --- | --- |
| Custom Pages per Vault | 200 |
| Distribution Size | 50 MB |
| Parallel Events | 3 |
| Event Queue | 50 events |

<Aside type="note" title="Additional Limits">
* All [Java SDK limits](/vault-sdk/references/limits-restrictions) apply to PageControllers

* REST API calls follow standard [API rate limits](/vault-api/references/api-rate-limits)

</Aside>

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