[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[IDV #HZA-459071]: IDV - NOAA pathfinder v5 sst data

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [IDV #HZA-459071]: IDV - NOAA pathfinder v5 sst data
  • Date: Fri, 01 Sep 2006 10:57:50 -0600
Valentijn-

> thanks for your help with Joseph's issue, and the other students.

At some point, if we get overwhelmed, I might want to funnel all
questions from ITC through one point of contact, but for now we'll
handle them as we can.

> On the lack of memory, what is the maximum memory i can allocate to the IDV. 
> I have my JAVA webstart JNLP set at something like -xm1120, but get an error 
> when increasing this further.

What is the error?

It will depend on your system.  Windows will only use a maximum of 
1.5 Gb and for that you should have 2.0 Gb of physical RAM.  For
Linux systems, you should be able to increase it to 70% of your
physical RAM.

> Probably technically impossible, but are there plans under way that will help 
> IDV to be more memory conservative?

We've been spending a lot of time on improving performance and memory
use in the IDV over the past few months.  We have started
looking at images (satellite, color shade plan views) and are
hopeful to make some gains there.  One problem we have now is
that Java 3D requires texture maps to be powers of 2 in size,
so if you have a 520x520 image, that ends up creating a 1024x1024
texture map which almost doubles the memory allocation there.
For the Image Display and the 3 Color (RGB) display, we have added
a property to set the maximum image size to use (in total pixels)
and the IDV will subsample the image before trying to display it.
We will probably fold this into the color shaded plan view at
some point.

So, the short answer is that we are working on the issue and
have had some success, but we are always striving to improve
the memory consumption.

Don

Ticket Details
===================
Ticket ID: HZA-459071
Department: Support IDV
Priority: Normal
Status: Open