Instant Purge lets you update stale content within 150 milliseconds or less. When you issue a purge request, our servers stop delivering cached versions of that content. Once a visitor to your site requests the purged content, we retrieve an updated copy from your origin server and serve it as soon as it’s live on your web server.
You can trigger Instant Purge using the Fastly Control Panel, or via an HTTP API call. Purging can be done on an individual URL basis, by surrogate key, wildcard, or you can purge your entire site at once.