---
title: Enable features gradually
summary: Avoid a huge inrush of traffic to origin caused by gradually applying changes that affect the cache key, like segmented caching, over hours or days.
url: https://www.fastly.com/documentation/solutions/examples/enable-features-gradually
---

Avoid a huge inrush of traffic to origin caused by gradually applying changes that affect the cache key, like segmented caching, over hours or days.

## VCL

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/9571e786)