Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Message-ID: <3FA14BA2.4AE0C62E@dessent.net> Date: Thu, 30 Oct 2003 09:34:26 -0800 From: Brian Dessent Organization: My own little world... X-Accept-Language: en,en-US MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: Does cygwin have a 2GB Memory/RAM limit ? References: 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@americancentury.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/