centos 6 清除内存中的系统缓存
2018/9/12 13:23:00
To free pagecache://释放页缓存
echo 1 > /proc/sys/vm/drop_caches
To free reclaimable slab objects (includes dentries and inodes)://释放inode和目录树缓存
echo 2 > /proc/sys/vm/drop_caches
To free slab objects and pagecache://包括1和2,即释放所有缓存
echo 3 > /proc/sys/vm/drop_caches