in reply to [OT]What is "buffers" and "cached" memory in Linux system box?
this article explains the fundamentals
From my test, the kernel take back all of the "buffers" mem, but leave some for the "cached".
Linux localhost.localdomain 188.8.131.52 #1 SMP Wed Sep 17 10:54:46 CST 2008 x86_64 x86_64 x86_64 GNU/Linux
And the program I run mainly deal with the network data through loop-back address.
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