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> Between 2-4% of requests can’t be served via our caches, and there are users who always need to be served by our main (uncached) application servers. This includes anyone who logs into an account, as they see a customized version of Wikipedia pages that can’t be served as a static cached copy,

Is this why we get logged out every 30 days, to boost cache hits for users who rarely need to be logged in? (It seems like every time I want to make an edit I have to login again.)




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