linux-kernel - Copying large files eats all of the RAM

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Message-ID: <CAKK=TUJ=ebu3+hBQmm+5=uooCFo9y3oAS_JfSn_KOtfxCLBvQQ@mail.gmail.com>
Date:	Thu, 28 Nov 2013 19:31:32 +0530
From:	venkata koppula <vmrkoppula@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Copying large files eats all of the RAM

Hi,

I am using cp command to copy a list of files each with size of around
1GB (copy within the same hard disk).

My laptop has 4GB of ram, before I issue the command around 1.5GB of memory
is used, when I issue the cp command around 3.7GB of memory is used.
And the cp command takes a lot of time to copy.

I am not able to launch other applications(take a lot of time) and
even compiz freezes frequently. my laptop has Ubuntu installed on it.

Is this the problem with only my system or it is a common problem with Linux?.

Is there any way to stop any copy command to use all of my memory.

Thanks
Venkat
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