Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Message-ID: <3FA14BA2.4AE0C62E@dessent.net>
Date: Thu, 30 Oct 2003 09:34:26 -0800
From: Brian Dessent <brian AT dessent DOT net>
Organization: My own little world...
X-Accept-Language: en,en-US
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Re: Does cygwin have a 2GB Memory/RAM limit ?
References: <OF54EF603F DOT 39AC59DC-ON86256DCF DOT 005D9BF9-86256DCF DOT 005DF81F AT americancentury DOT com>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-AntiAbuse: This header was added to track abuse, please include it with any abuse report
X-AntiAbuse: Primary Hostname - host.linuxsv3.net
X-AntiAbuse: Original Domain - cygwin.com
X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12]
X-AntiAbuse: Sender Address Domain - dessent.net
Note-from-DJ: This may be spam

Dan_Nazario/ACIM/americancentury AT americancentury DOT com wrote:

> Coming from a Solaris background, it did not even occur
> to me that "Windows 2003 enterprise server" would
> impose a 2GB usable memory limit by default on an application.
> 
> Doesn't seem like a very 'enterprise' sort of thing to do ;-)

It has less to do with the wishes of the software and everything to do
with ths IA32 architecture.  Despite the efforts of PAE, the x86 chips
can only address 32 bits (4GB) at any given time.  Since there must be
some division between kernel space and user space, it naturally follows
that there must be some artificial limit of under 4GB for applications. 
It would be a Bad Thing if the kernel were to run out of pages, hence
the default 50/50 partition.

Brian

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/