linux系統清理緩存教程
linux系統清理緩存教程
今天用spot on light 查了一下開發服務器的內存占用，只剩下60MB，用下面的方法就可以實現清空緩存頻繁的文件訪問會導致系統的Cache使用量大增。接下來是小編為大家收集的linux系統清理緩存教程，歡迎大家閱讀：
linux系統清理緩存教程
命令
#sync
#echo 3 > /proc/sys/vm/drop_caches
查看內存情況：
# more /proc/meminfo
Kernels 2.6.16 and newer provide a mechanism to have the kernel drop the page cache and/or inode and dentry caches on command, which can help free up a lot of memory. Now you can throw away that script that allocated a ton of memory just to get rid of the cache...
To use /proc/sys/vm/drop_caches, just echo a number to it.
To free pagecache:
# echo 1 > /proc/sys/vm/drop_caches
To free dentries and inodes:
# echo 2 > /proc/sys/vm/drop_caches
To free pagecache, dentries and inodes:
echo 3 > /proc/sys/vm/drop_caches
This is a non-destructive operation and will only free things that are completely unused. Dirty objects will continue to be in use until written out to disk and are not freeable. If you run "sync" first to flush them out to disk, these drop operations will tend to free more memory.
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