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[IDV #KUJ-685967]: video ram system ram ??
- Subject: [IDV #KUJ-685967]: video ram system ram ??
- Date: Mon, 04 Jan 2010 09:46:06 -0700
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