[vtk-developers] Is there a memory limit for vtkImageData and orvtkUnsignedshortArray

Olivier Robin Olivier.Robin at bioclinica.com
Thu Dec 17 03:32:07 EST 2009


Hello,

I tried to reboot my pc (windows xp 3 Gb ram), I tried to another PC,
and I found that this limit seem to be around the same value, all the
time during my tests.

I continue to investigate.

Thank you
Olivier

On Wed, 2009-12-16 at 10:23 -0700, David Gobbi wrote:
> Hi Oliver,
> 
> There are no hidden memory limits in VTK, but the vtkImageData object
> will always allocate the whole image as one contiguous block of
> memory.  On Win32 systems this is a problem, because Win32 suffers
> from memory fragmentation, i.e. if it has been a long time since your
> last reboot then even if there is a lot of memory available, it is
> only available in relatively small chunks.
> 
> Sometimes just rebooting will solve the problem.  Or you can move to a
> system that doesn't suffer so badly from memory fragmentation, like
> 64-bit WinXP.  I also seem to remember reading somewhere that Windows
> 7 has reduced memory fragmentation.
> 
>    David
> 
> 
> On Wed, Dec 16, 2009 at 9:45 AM, Olivier Robin
> <Olivier.Robin at bioclinica.com> wrote:
> > Hello,
> >
> > I am working under project using vtk (the Activiz version), under window
> > XP SP1, visual studio. my project is in c#.
> >
> > when I use object like vtkImageData, or vtkUnsignedShortArray, and try
> > to allocate memory, I have a low memory limit, around 90 Mbyte, may be a
> > little bit more.
> >
> > is there an officially limit in using memory with theses object (My
> > vtkImageData would like to use more than 110 Mbyte, because I have a
> > Dicoml SErie with more than 1600 slices) ?
> > is there a way to modify trhis limit ?
> >
> > thank you for any feedback
> > Olivier
> >
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