Shulou(Shulou.com)06/03 Report--

For program exception terminal, the data in cache is not synchronized to disk. You need to call sync to synchronize data to disk first, and then empty drop_caches cache.

Use sync command to synchronize data to disk before emptying cache

# cat /proc/sys/vm/drop_caches

Default is 0, 1 to clear page cache, 2 to clear inode and directory tree cache, 3 to clear all cache

#sync

#free -m

total used free shared buffers cached

Mem: 23953 4741 19211 0 967 2129

-/+ buffers/cache: 1644 22308

Swap: 12047 0 12047

#echo 3 > /proc/sys/vm/drop_caches

#free -m //cache detail reduction will be found

total used free shared buffers cached

Mem: 23953 735 23218 0 3 74

-/+ buffers/cache: 656 23296

Swap: 12047 0 12047

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