How to clean up buffer or cache momory?

[Manish Katiyar]

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