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From:	Vince Hoffman <Vince DOT Hoffman AT uk DOT circle DOT com>
To:	"'dan_nazario AT americancentury DOT com'" <dan_nazario AT americancentury DOT com>,
	cygwin AT cygwin DOT com
Subject:	RE: Does Cygwin have a 2GB Memory/RAM limit ?
Date:	Thu, 30 Oct 2003 13:39:17 -0000
MIME-Version:	1.0

Although it doesnt seem to agree fully with Gerrits description, there is a
good description of what that /3Gb switch does at
http://www.sysinternals.com/ntw2k/info/bootini.shtml
It is related to memory not disk partitions, but read for yorself rather
than have me paraphrase it.

> -----Original Message-----
> From: Dan_Nazario/ACIM/americancentury AT americancentury DOT com
> [mailto:Dan_Nazario/ACIM/americancentury AT americancentury DOT com]
> Sent: 30 October 2003 13:25
> To: cygwin AT cygwin DOT com
> Subject: Re: Does Cygwin have a 2GB Memory/RAM limit ?
> 
> 
> 
> 
> 
> 
> Gerrit - thanks for your reply.
> 
> In looking at the boot.ini snip, it looks like it is related 
> to the size of
> disk partitions being greater than 2GB.
> 
> I'm referring to a limit on the RAM/Memory that cygwin 
> appears to impose.
> My server has 8GB of RAM, but cygwin sees only 2GB of it according to
> vmstat and top commands running in the cygwin bash shell.
> 
> 
> Dan Nazario
> 
> 
> 
> 
> 
>                                                               
>                                                                     
>                                                               
>                                                                     
>                         "Gerrit P.                            
>                                                                     
>                         Haase"                 To:       
> "Dan_Nazario/ACIM/americancentury AT americancentury DOT com"        
>            
>                         <freeweb AT nyckel         
> <dan_nazario AT americancentury DOT com>                             
>                     
>                         piga.de>               cc:       
> cygwin AT cygwin DOT com                                             
>            
>                                                Subject:  Re: 
> Does Cygwin have a 2GB Memory/RAM limit ?                            
>                         Sent by:                              
>                                                                     
>                         cygwin-owner AT cy                       
>                                                                     
>                         gwin.com                              
>                                                                     
>                                                               
>                                                                     
>                                                               
>                                                                     
>                         10/30/2003                            
>                                                                     
>                         06:10 AM                              
>                                                                     
>                         Please respond                        
>                                                                     
>                         to "Gerrit P.                         
>                                                                     
>                         Haase"                                
>                                                                     
>                                                               
>                                                                     
>                                                               
>                                                                     
>                                                               
>                                                                     
>                                                               
>                                                                     
>                                                               
>                                                                     
> 
> 
> 
> 
> Dan wrote:
> 
> 
> > Can anyone else confirm this - that memory above 2GB is not 
> visible to
> > cygwin.  Any known work-arounds?
> 
> There is a Windows limitation, no application may allocate 
> more then 2GB
> unless you specify the right value (e.g. /3GB) in the boot.ini file.
> 
> boot.ini example:
> 
> [Boot Loader]
> Timeout=7
> Default=scsi(0)disk(0)rdisk(0)partition(1)\WINNT
> [Operating Systems]
> scsi(0)disk(0)rdisk(0)partition(1)\WINNT="Windows 2K Server" /3GB
> scsi(0)disk(0)rdisk(0)partition(1)\WINNT="Windows 2K Server 
> [VGA-Modus]"
> /basevideo /sos
> 
> 
> Gerrit
> --
> =^..^=                                     
http://nyckelpiga.de/donate.html


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