Memory problems in Windows 7 32bits

[Carles Rentero-2]

Dear all,

I’ve just updated my computer (Intel CoreDuo, 2Gb RAM) to Windows 7 32bits,
and the JRE is the Jave 1.7.0_01 [32-bit], and I’m running ImageJ 1.46a. I
used to run this computer under MS Windows XP, and the maximum memory I
allowed ImageJ was 1400Mb. Nowadays, when other software is running on the
computer (less memory available for ImageJ), an error message pops up
“Error: Could not create the Java Virtual Machine”, and I only can run
ImageJ when reducing the ImageJ memory usage on the “ImageJ.cfg” file. I
have also realized that ImageJ is using less memory than the allocated on
the “ImageJ.cfg” file when checking on the ‘About ImageJ…’ tab.

 

Has anybody experienced the same problem? Is it a MS Windows, Java or ImageJ
problem? I may have something not properly configured somewhere…

 

Thanks a lot,

Carles.

 

--

Carles Rentero, PhD

Dept. de Biologia Cel·lular, Immunologia i Neurociències

Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS)

Facultat de Medicina - Hospital Clínic de Barcelona

Universitat de Barcelona (UB)

 

c/ Casanova, 143

08036 Barcelona

SPAIN

 

phone: [phone] ext. 3358

FAX: [phone]

[reinhard rachel]

>>>
> I’ve just updated my computer (Intel CoreDuo, 2Gb RAM) to Windows 7
32bits,
> and the JRE is the Jave 1.7.0_01 [32-bit], and I’m running ImageJ 1.46a.
I
> used to run this computer under MS Windows XP, and the maximum memory I
> allowed ImageJ was 1400Mb. Nowadays, when other software is running on the
> computer (less memory available for ImageJ), an error message pops up
> “Error: Could not create the Java Virtual Machine”, and I only can run
> ImageJ when reducing the ImageJ memory usage on the “ImageJ.cfg” file.
I
> have also realized that ImageJ is using less memory than the allocated on
> the “ImageJ.cfg” file when checking on the ‘About ImageJ…’ tab.
>
> Has anybody experienced the same problem? Is it a MS Windows, Java or
ImageJ
> problem? I may have something not properly configured somewhere…

As I do not know the exact configuration of your PC/labtop, I only can guess
what the problem might be.
Just note that WindowsXP-32bit usually/typically 'allocates' some 300 to
350/400 MB of main memory (very much depending on many other programs
installed, like Virus protection, skype, etc).
FOr Windows7, this figure on my Laptop (yes, with Window7-64bit) is at about
1.5 GB (!!), without doing any image processing yet, meaning that with a
32bit-system with 2GB 'only', I would not recommend to start to do large
dataset image processing under Windows7, at all. - Increasing main memory to 4
GB may help to overcome this problem. (Or you go back to WinXP; but I would not
recommend this).
Note that on a PC / laptop with 4 GB main memory, a 32bit-OS (WinXP or Win7)
will only be able to address some 3.3x GB - the rest (about 0.6 GB) is in fact
useless, cannot be addressed, due to the limitations of the OS. (8GB main
memory would not help, if the OS is a 32bit version).
So for me, I switched to Win7 and 64bit, and ignore the problems of 32bit
(then having other problems ...).
kind regards,
Reinhard


--
Prof. Dr. Reinhard Rachel
University of Regensburg
Centre for EM / Anatomy
Faculty of Biology & Preclin. Med.
Universitaetsstr. 31
D-93053 Regensburg - Germany
tel [phone], 1720
fax [phone]
mail [hidden email]
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