Linux 釋放記憶體

To free pagecache:

$ sudo sh -c 'free -m && echo 1 > /proc/sys/vm/drop_caches && free -m'"

To free pagecache, dentries and inodes:

$ sudo sh -c 'free -m && sync && echo 1 > /proc/sys/vm/drop_caches && free -m'"

Reference :
kernel - How do you empty the buffers and cache on a Linux system? - Unix & Linux Stack Exchange
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