To check uses of Cache Memory
free -m
rahul@rahul-laptop:~# free -m
total used free shared buffers cached
Mem: 992 898 94 0 14 460
-/+ buffers/cache: 604 388
Swap: 1011 132 879
To Release/ Free Cache Memory
rahul@rahul-laptop:~# sync, echo 3 > /proc/sys/vm/drop_caches
Above command will free used cache memory
to verify run again free -m
OR
rahul@rahul-laptop:~# sync && echo 1 > /proc/sys/vm/drop_caches
