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No, cached+buffered RAM is just the OS using any RAM it can, because not using it would be wasteful. It caches recent disk lookups in this spare memory until that memory is needed for more immediate things. See also: Linux Ate My RAM


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Try to use fastcgi_hide_header: fastcgi_hide_header "Set-Cookie"; This will hide all cookies when the request hits cache. official docs


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Try to increase md/stripe_cache_size here file which you have to create #/etc/udev/rules.d/83-md-stripe-cache.rules KERNEL=="md*", ACTION=="add", TEST=="md/stripe_cache_size", ATTR{md/stripe_cache_size}="8192" It worked for me on Raid-6 And I suggest you to reduce dirty ratio because it caused me problems on x64 system I use this settings add to ...


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You can't tell the browsers of random people on the Internet to flush their caches; it's not how things are done. For next time, remember to reduce the TTL on your A records to some suitably small value (like, say, "five minutes") some time before the change over will happen. That will limit the time that well-behaved Internet citizens will cache, and the ...


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If you've shut the machine down and it's still answering, then the problem isn't the machine, it's something upstream. I'm thinking either your DNS is pointing to somewhere else, or you've got a rather aggressive caching proxy between you and the far end.



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