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Re: Re: Out of memory

• To: mathgroup at smc.vnet.net
• Subject: [mg36049] Re: [mg36025] Re: Out of memory
• From: "Julio Vera" <jvera at adinet.com.uy>
• Date: Wed, 14 Aug 2002 05:35:17 -0400 (EDT)
• References: <aj17k5$2nu$1@smc.vnet.net> <200208130922.FAA10059@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Gareth,

I have 64 MB of RAM. If I increase this, do you think I will get an
improvemente in Mathematica performance? I thought it used the hard disk as
a regular procedure, and not because the computer ran out of RAM.

Thanks for your suggestions.

Julio

----- Original Message -----
From: "Gareth J. Russell" <gjr2008 at columbia.edu>
To: mathgroup at smc.vnet.net
Subject: [mg36049] [mg36025] Re: Out of memory


> Julio,
>
> I don't know about Windows in particular (never use it), but while you can
> use hard disk space as temporary memory space, it is much slower than
using
> real memory. And using a disk on a slow external connection such as USB
will
> be even slower. You calculation may never finish! I suggest:
>
> 1) Getting as much real memory as possible. It is pretty cheap right now.
>
> 2) Checking your calculations to see if you can reduce the amount of
memory
> used.
>
> Depending on what it is that is eating up all the memory, the participants
> in this group may be able to help you with (2).
>
> Gareth
>
> P.S. I note also that you didn't tell us how much real memory you have. If
> you don't have much, so that your calculation starts using hard disk space
> immediately, it might turn out that with real memory, your calculation
does
> not take as long as you thought...
>
>
> On 8/9/02 4:06 PM, in article aj17k5$2nu$1 at smc.vnet.net, "Julio Vera"
> <jvera at adinet.com.uy> wrote:
>
> > For long calculations, sometimes a message appears, telling the program
> > is out of disk space. The kernel shuts down.
> >
> > I searched the archives for the list, and found a number of postings on
> > this issue, but none of them solved my problem.
> >
> > I have 1.7 G of free space in my internal hard disk, but also have 22 G
> > free in my Buslink USB external hard drive. I would like to use this
> > space for the calculations.
> >
> > In Windows98 (control panel, system, performance, advanced, virtual
> > memory) there is an option to use this space, but it seems like its
> > either internal disk or external disk. I didn't dare to change it to
> > the external disk, because I received a scary message from W98 (you may
> > not be able to restart your computer).
> >
> > If I change the settings, will I be able to restart the PC? Is there a
> > way to use both disks succesively? Is there a way to use the external
> > one, but without restarting the computer? Is it possible to do this
> > directly from Mathematica?
>
>

• References:
  • Re: Out of memory
    • From: "Gareth J. Russell" <gjr2008@columbia.edu>