OS/2 swapping for Mathematica
- To: mathgroup at christensen.cybernetics.net
- Subject: [mg1597] OS/2 swapping for Mathematica
- From: "Michael U. Bogatyriev" <mbog at tulgtu.tula.su>
- Date: Tue, 4 Jul 1995 01:08:24 -0400
- Organization: Tula Tech. University
Hello,
> > Could someone please explain how Mathematica for OS2 uses virtual
> > memory? Is it capable of swapping out active blocks of memory?
>
> In OS/2, as in Windows, virtual memory is a function of the operating system.
> Functional details of virtual memory, such as swapping pages of memory to and
> from the hard disk, are handled by the operating system and are invisible to
> user programs, including Mathematica. So, in essence, you are actually asking
> if OS/2 can swap out active blocks of memory for running programs. Yes, it
> can, as can Windows, although OS/2 has fewer limitations (see below).
...........
> > Ezra D. Greenberg
> > Department of Economics
> > University of Maryland at College Park
> > edg at wam.umd.edu
>
> John Fultz
> Wolfram Research, Inc.
>
My experience in running Mathematica under OS/2 confirms Mr. Fultz's opinion
that OS/2 arranges swap file more effectively than Windows. Moreover I run
Mma as a Windows's session from OS/2. Having 60 Mbytes swap declared in OS/2,
I see OS/2 dynamically distributes it and there are no problems with such
Mma's functions as NDSolve[].
But there is another problem. Mathematica takes from Windows all processor
resources (100% even I did not load Mma's kernel!). Other users in OS/2 do not
like my Mathematica (but I do!).
May be I need real OS/2 Mathematica version for optimal computing?
Sincerely,
Michael Bogatyriev
Department of Automatic Control
Tula State Tech. University
Tula 300600 RUSSIA
mbog at tulgtu.tula.su