---
title: Instrumentation
description: Learn how to use instrumentation to run code at server startup in your Next.js app
url: "https://nextjs.org/docs/14/pages/building-your-application/optimizing/instrumentation"
version: 14.2.35
lastUpdated: 2023-06-28
prerequisites:
  - "Building Your Application: /docs/14/pages/building-your-application"
  - "Optimizing: /docs/14/pages/building-your-application/optimizing"
---


---

For an index of all available documentation, see [/docs/14/llms.txt](/docs/14/llms.txt)