I havent heard of any solutions for this! since I posted this I up graded my computer to a Dell t7500 x5560@ 2.80 ghz (2 processors). It doesnt bog down as much with this machine but still has a huge memory leak! I can have up to 15 gig of ram missing at a time unless I reboot. Hope autodesk figures it out soon!
It's not grading objects, because i don't use those and i still get the problem. I think it's the logic structure autocad uses. It's also a reason why it's not multi-core capable.
I'm having the same problem. I've noticed a significant increase in memory usage when I plot. Plotting takes a long time too, even to plot a very simple sheet. Something with only linework, like a profile.
This is my memory usage after plotting a couple of times. You can see how it creeps up while plotting, and stays at that level after the plot is done.
This is after closing C3D 2013.
So many things to consider! I have not have this problem and I work with relatively large files that contain any number of grading objects, corridors, surfaces, pipe networks.
I can't say with any certainty why you would have a memory usage spike that would cause you to cold reboot but what are you doing with virtual memory? Do you have it set to a static value or do you let windows manage?
Intel Xeon 3.07 GHz 64bit Windows 7
NVidia Quadro 2000
I am having similar issues. The average size file I work with is about 250KB. When I close a file out, AutoCAD seems to 'hold onto' that memory amount, and keeps progressing in size until the computer starts to lose responsiveness. I only have to close and reload AutoCAD to fix- I don't have to reboot the computer- but that's still a pain to have to do, not to mention the increasing loss of responsiveness as it builds.
Just to note, not that it likely matters in the WHY this is happening, but I use 2 AutoCAD windows simultaneously on a dual-monitor system, sometimes with as many as 4 or so 250KB files open at the same time. Usually when the Task Manager shows each AutoCAD at about 400,000KB is when I start having significant loss of responsiveness. I will have a couple of other windows open also (maybe Chrome, Media Player, Excel) but the amount of windows I am using doesn't approach my 6GB of memory except for the excess memory AutoCAD is holding onto.