if you want to clear the linux cached memory run “echo 3 > /proc/sys/vm/drop_caches”
root@pc:~# free total used free shared buffers cached Mem: 3951136 2979376 971760 0 29704 2488576 -/+ buffers/cache: 461096 3490040 Swap: 3050492 2268 3048224 root@pc:~# echo 3 > /proc/sys/vm/drop_caches root@pc:~# free total used free shared buffers cached Mem: 3951136 511264 3439872 0 1828 99752 -/+ buffers/cache: 409684 3541452 Swap: 3050492 2268 3048224
it clears it all 🙂