清除pagecache
先执行sync
# echo 1 > /proc/sys/vm/drop_caches
清 除dentries和inodes cache
# echo 2 > /proc/sys/vm/drop_caches
清 除pagecache, dentries 和 inodes
# echo 3 > /proc/sys/vm/drop_caches
转载于:https://blog.51cto.com/huxinxin/1060841
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