Re: Extreme memory usage

• To: Ben Monnahan <monnahan@xxxxxxxxxxxxxxxxxx>
• Subject: Re: Extreme memory usage
• From: Bill Hibbard <billh@xxxxxxxxxxxxx>
• Date: Tue, 3 Jun 2003 10:03:29 -0500 (CDT)

Hi Ben,

As I said in my previous message, the next thing is to try
the most recent visad.jar.

However, I have also run some memory use tests. Your 120 Fields
of 48 points each need about 23 KB for storing each value as
a 4-byte float. The biggest memory use has got to be storing
the pixels of the Frame.

I was able to run a bunch of our tests, some creating two
DisplayImplJ2Ds and some creating two DisplayImplJ3D, using
a memory limit of 8 MB (i.e., '-mx8m' on the command line).

If Java3D is using over 300 MB, and Java2D is using 61 MB,
then it may be a problem with the Java and Java3D installation
on your computer.

If you can send me a copy of your whole program to run,
including data, I can check how much memory it needs on my
system.

Bill

> I am actually using VisAD code from last summer.  Half a year ago or so I
> did try to move to a newer VisAD codebase, but ran into problems with it
> and didn't have time to work through them at that point.  If you think
> that this could be [part of] the problem I can do it now.
>
> _lineSets and _pointSets are arrays size 1 of Linear1DSet's.  The sets are
> length 48.
>
> _plotCountTotal is 120.
>
> This is with a DisplayImplJ3D with a 2d renderer so that I can use the
> rubberband zooming..
>
> OK, I just ran a test with a DisplayImplJ2D and it works and uses 61M.
> About 48M as everything is loading.  This still seems pretty large to me
> considering the amount of data being loaded is only 120x48.
>
> Let me know if any other information would be helpful.
>
> Ben
>
>

• References:
  • Re: Extreme memory usage
    • From: Ben Monnahan