Prevent a new cache for each SSR request

Hi !

According to this quote:

> @apollo/experimental-nextjs-app-support makes sure that we only instance the Apollo Client once per request, since Apollo Client’s cache is designed with a single user in mind, we recommend that your Next.js server instantiates a new cache for each SSR request, rather than reusing the same long-lived instance for multiple users’ data.

[Read more here](https://www.apollographql.com/blog/how-to-use-apollo-client-with-next-js-13?ref=dailydev&utm_source=chatgpt.com#an-example-of-data-fetching-inside-server-components)

It seems that Apollo Client creates a next cache by SSR request, probably according to the header.

The problem is that for the same user, a request can be cached several times if the headers contain data modified during the same session.
Have I understood the current behavior correctly and is it still relevant?

If so, is it possible to customize this operation, for example to create a cache per request only for 1 same user ID to prevent a huge amount of data being cached for nothing ?

Versions:
`"next": "15.3.0"`
`"@apollo/experimental-nextjs-app-support": "^0.11.2"`

Start by reviewing @apollo/experimental-nextjs-app-support with Next.js 15.3.0 and the linked Apollo guidance to establish how SSR requests and headers affect cache creation. Confirm the current behavior, then determine whether a per-user cache customization is a supported and well-scoped change.

Written by the indexing model from the issue text.