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Re: Use of large memory


> -----Original Message-----
> From: Gerry Flanagan [mailto:flanagan at materials-sciences.com]
To: mathgroup at smc.vnet.net
> Sent: Thursday, September 02, 2004 3:35 AM
> To: mathgroup at smc.vnet.net
> Subject: [mg50422] [mg50412] Use of large memory
>
>
> I was running into memory limits for a large numerical problem in V5.0. The
> fastest fix (I thought) was to get a large amount of RAM. We purchased a
> Pentium 4 machine running XP, with 4GB of memory. I built a test function
> that progressively uses more memory and prints MemoryUsed[].
> Every time I get to just under 2GB of memory, I get the out-of-memory
> error from the  kernal. There's nothing else running, and task manager says
> there's plenty left. Has anyone found some Windows XP tweak that allows
> Mathematica to use what's available? Would this all work better in Linux?
>
> Gerry Flanagan
>

Hi Gerry,

Investigate the XP boot-time switches '/3gb' and '/userva'.

*** N.B. They are dangerous; see

http://support.microsoft.com/default.aspx?scid=kb;en-us;328269

Even if they work safely for you, the *per-process* memory limit might
only increase to ~ 2.75 GB.

Vince Virgilio

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