# Cross-link map: Concurrency scaling (/docs/functions/concurrency-scaling)

> From the Vercel docs graph (built 2026-09-22T05:27:54.083Z), spanning vercel.com docs + KB, nextjs.org, ai-sdk.dev, and other Vercel documentation sites. Full graph as JSON: https://vercel.com/docs/graph.json

## Semantically closest pages

- [Vercel Functions now scale 12x faster for high-volume requests](https://vercel.com/changelog/vercel-functions-now-scale-12x-faster-for-high-volume-requests?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=semantic)
- [What should I do if I receive a 503 error on Vercel?](https://vercel.com/kb/guide/what-should-i-do-if-i-receive-a-503-error-on-vercel?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=semantic) — Learn about when Serverless Functions return a 503 status code and what can be done about them.
- [Legacy Usage & Pricing for Functions](https://vercel.com/docs/functions/usage-and-pricing/legacy-pricing?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=semantic) — Learn about legacy usage and pricing for Vercel Functions.
- [Vercel Functions](https://vercel.com/docs/functions?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=semantic) — Build API routes, webhooks, and agent request handlers with Vercel Functions, then test and debug them with Vercel CLI.
- [Account Plans on Vercel](https://vercel.com/docs/plans?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=semantic) — Learn about the different plans available on Vercel.

## This page links to (4)

- [Working with Drains](https://vercel.com/docs/drains?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=outbound) — Drains collect logs, traces, speed insights, and analytics from your applications. Forward observability data to custom
- [Vercel Functions](https://vercel.com/docs/functions?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=outbound) — Build API routes, webhooks, and agent request handlers with Vercel Functions, then test and debug them with Vercel CLI.
- [Runtime Logs](https://vercel.com/docs/logs/runtime?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=outbound) — Learn how to search, inspect, and share your runtime logs with the Logs tab.
- [Account Plans on Vercel](https://vercel.com/docs/plans?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=outbound) — Learn about the different plans available on Vercel.

## Pages that link here (8)

By site: vercel-changelog (1) · vercel-kb (1) · vercel-web (1) · vercel-docs (5)

### From vercel-changelog

- [Python function bundles now include precompiled bytecode](https://vercel.com/changelog/python-function-bundles-now-include-precompiled-bytecode?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=inbound)

### From vercel-kb

- [How can I improve function cold start performance on Vercel?](https://vercel.com/kb/guide/improve-function-cold-start-performance-on-vercel?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=inbound) — Learn how to confirm whether cold starts cause function latency on Vercel, and how Fluid compute reduces how often they

### From vercel-web

- [Scale to one: How Fluid solves cold starts](https://vercel.com/blog/scale-to-one-how-fluid-solves-cold-starts?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=inbound)

### From vercel-docs

- [Vercel Functions Limits](https://vercel.com/docs/functions/limitations?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=inbound) — Learn about the limits and restrictions of using Vercel Functions.
- [Runtimes](https://vercel.com/docs/functions/runtimes?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=inbound) — Runtimes transform your source code into Functions, which are served by our CDN. Learn about the official runtimes suppo
- [Edge Runtime](https://vercel.com/docs/functions/runtimes/edge?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=inbound) — Learn about the Edge runtime, an environment in which Vercel Functions can run.
- [Legacy Usage & Pricing for Functions](https://vercel.com/docs/functions/usage-and-pricing/legacy-pricing?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=inbound) — Learn about legacy usage and pricing for Vercel Functions.
- [Vercel Enterprise Plan](https://vercel.com/docs/plans/enterprise?from=graph&source_path=%2Fdocs%2Ffunctions%2Fconcurrency-scaling&source_site=vercel-docs&relationship=inbound) — Learn about the Enterprise plan for Vercel, including features, pricing, and more.