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2025-04-01 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Internet Technology >
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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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