[IDV #KUJ-685967]: video ram system ram ??

Hi Ian-

I'm just following up on this.

The Intel graphics chip seems to be prone to this problem.  If you are running 
a 64 bit version of Windows, try using the 64-bit version of the IDV and see if 
you up the memory above 1Gb.

Don Murray

> Unidata IDV Support wrote:
> > Hi Ian-
> >
> >
> >> I am following up on my question.  I look forward to your response.
> >>
> >
> > Sorry for the delay in responding.
> >
> No worries
> >
> >> I have modified the runIDV.bat file to allow for more memory usage.
> >> The computer has over 3.4 gig of RAM
> >> The video card has 1024 meg of RAM.
> >> I have ensured all of the drivers on the video card are up to date and
> >> we are running the latest version of java.
> >>
> >> IDV displays information fine when memory usage is set to 512.meg
> >> When I go up over 958 meg, the map display stops working properly.  (the
> >> default boundaries of coastlines are not displayed and I get a black
> >> screen)
> >> Am I limited by the video card RAM?
> >>
> >
> > For the 32-bit version of Windows, the theoretical limit is 1.5 Gb that can 
> > be used by Java. On some systems, there seems to be a link between the 
> > system RAM and the video RAM so that moving above 1 Gb causes the problems 
> > you see.  We do not have a solution for this at this time.  What type of 
> > graphics card is this?
> >
> Hmmm, I do not know much about hardware, but the display settings under
> Control Panel say Mobile Intel 4 Series Express Chipset Family . . .
> does that help?
> >
> >> Furthermore, loading derived quantities like 1000-500 mb thickness takes
> >> a tremendous amount of time.  Is there something I can do to speed that up?
> >>
> >
> > In the 2.7u2 version of IDV, to do the thickness it would have to download 
> > all levels of the geopotential height, then slice and do the difference.  
> > In the IDV nightly build (2.8a1), it now only downloads the 1000 and 500 mb 
> > levels and does the difference.  However, if you are using a high 
> > resolution grid, it will still take some time to download.  You could 
> > reduce the resolution and/or spatial extent of the grid to speed up the 
> > download.
> >
> > Please note that the nightly builds come with a "big-boy" caveat, 
> > especially ones labeled with an "a" (alpha).  At any point, it may have 
> > some instability issues, but in general, we try to make sure that it 
> > performs well.
> >
> Thanks! . . . I'll explore this
> > Don Murray
> >
> > Ticket Details
> > ===================
> > Ticket ID: KUJ-685967
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> >
> 
> 


Ticket Details
===================
Ticket ID: KUJ-685967
Department: Support IDV
Priority: Critical
Status: Closed