How to clean up buffer or cache momory?

[Wang Chao]

On 02/16/12 at 09:33pm, 黄小伟 wrote:
> I know this, but I want to reclaim dynamically. Say in a shout time, several seconds.
Why do want to do that? Does it have a bad influence on performance?
Kernel will reclaim these cache itself when your machine runs out of mm.
> 
> 
> 
> 
> 
> 在 2012-02-16 21:21:11，"Manish Katiyar" <mkatiyar at gmail.com> 写道：
> >2012/2/16 黄小伟 <jingle2422 at 163.com>:
> >>  Hi
> >>      I encounter a problem recentely. My system supports USB strorage and
> >> other network applications.
> >>      But after I put a file to usb storage, it will consume some many
> >> momory.
> >> (buffer + cache).
> >>      And these buffered memory can not be reclaimed(use free command).
> >> So I want to know how to reclaim the buffer memory in a short time.
> >
> >Google for ./sys/vm/drop_caches
> >
> >-- 
> >Thanks -
> >Manish
> >
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-- 
Thanks,
Chao Wang