It looks like joke: swapfile on "ramdysk" in 64bits system?
I look into file: /proc/meminfo and made some investigation. Look for line: SwapCached: nnnnn kB . One is what I don't understand. What for linux kernel caches swap? What for caching this? Isn't better idea leaving page as active?
Another, what is difference between swapping and paging? I never found exactly explanation about it. Where can I see counters?
Thanks for any explanation.