I have two MXD files, both of them have one feature layer with unique value renderer and multiple values.
Symbols are completely different but all of them are approximately 500 x 500 and 72 DPI. when I open them using ArcMap their memory usage are completely different, one of them use 450 MB and the other one user 1 GB of RAM.
What exactly is happening behind ArcMap visualization, and what parameter is affecting the memory usage?
I suspect that the answer to why the memory is so different is in you saying that the:
Symbols are completely different
To find out:
What exactly is happening behind ArcMap visualization
I think you will need to ask Esri via their support.
Alternatively, if you want to know:
what parameter is affecting the memory usage
then the expedient may be to experiment with those parameters and see if you can isolate what causes memory usage to increase/decrease.
