服务器缓存占用的处理方法

Writing to this will cause the kernel to drop clean caches, dentries and inodes from memory, causing that memory to become free.

To free pagecache:

* echo 1 > /proc/sys/vm/drop_caches             默认这种方式处理就可以

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

As this is a non-destructive operation, and dirty objects are notfreeable, the user should run "sync" first in order to make sure allcached objects are freed.

This tunable was added in 2.6.16.

本文出自 “zhanguo1110” 博客，请务必保留此出处http://zhanguo1110.blog.51cto.com/5750817/1543129

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服务器缓存占用的处理方法

原文：http://zhanguo1110.blog.51cto.com/5750817/1543129