1、將內存的數據寫回硬盤
sync
2、清除緩存
echo 3 > /proc/sys/vm/drop_caches
完成!
drop_caches 的解釋:
To free pagecache, use echo 1 > /proc/sys/vm/drop_caches;
to free dentries and inodes, use echo 2 > /proc/sys/vm/drop_caches;
to free pagecache, dentries and inodes, use echo 3 >/proc/sys/vm/drop_caches.