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Editorial Team
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Asked: 2026-05-16T06:24:23+00:00

I don’t quite understand how Google Analytics cookies work with Varnish. Do pages that

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I don’t quite understand how Google Analytics cookies work with Varnish.

  • Do pages that contain GA cookie not get cached?
  • Do I need to remove the GA cooke in vcl_recv?
  • If I do remove them, does that stop GA tracking visitors?
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  1. Editorial Team

    Cookies invalidate the cache if the Vary header is not set. For example, a client that goes to a URL with a certain login cookie will receive a different page than a client with a different cookie.

    In order to cache a page that has cookies that do not affect the cache-ability of the page (for example, Google Analytics on static sites), the cookies must be stripped or the cache won’t know whether two pages should be considered the same resource.

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