Excessive Memory Usage - Fusion 360 (Pan, Orbit, Zoom etc extremely slow)

[mihaicatalinr]

Hi,

There seems to be an issue with my Fusion since the last update. It worked just fine a while ago, but now it runs extremely slow, especially when orbiting or zooming. The memory usage for Fusion is extremely high (~1800MB - ~50% of memory), even though on the same laptop it worked very smooth before. 

I re-installed the program, I updated all the drivers, I followed all the steps in the threads below, but nothing seems to solve my issue. 

• https://forums.autodesk.com/t5/fusion-360-support/view-navigation-zoom-pan-orbit-extremely-slow/td-p...
• https://knowledge.autodesk.com/support/fusion-360/learn-explore/caas/sfdcarticles/sfdcarticles/How-t...

I use:

Microsoft Surface Laptop 3 I7 - 1065G7 @1.3 GHz 1.5 GHz - 16GB Ram

I'll attach here 2 snips: the graphic diagnostic and the processes in task manager

Help is appreciated. Thanks

[Mattxer · Accepted solution]

I was also having all of the issues you were having. Someone mentioned to check if the shortcut for Fusion has Compatibility mode set to Windows 8, after turning that off and restarting fusion my issues went away.

[0767183]

@Phil.E ok think I figure out both my issues, this first I think was caused by a failed windows update due to a missing or corrupted file. I got window all fix and re-download fusion 360 this solve my fusion not opening problem. Now on the slow fusion front you were correct that fusion doesn’t not handle the profile display of sketch’s very well. I’m surprised I’ve never run in to that limitation yet I guess I’ve just mostly model small stuff. Thanks for your help! 

[Phil.E]

Thanks for that update about compatibility mode. If this helps (or doesn't) for anyone on this thread, please respond and let us know what you find.

[Phil.E]

@0767183 If you could share that design I'm happy to test it out. Did you try temporarily turning off sketch profile display? That allows you to work on the sketch lines, without constantly computing the resulting profile. You do need to turn it back on for using it in commands, like Extrude.

[0767183]

@Phil.E here is the file. yes it was was easier to manipulate with the profiles turned off however those are the thing i'm using to extrude from. Would inventor or autocad handle doing a model like this better? 

[HughesTooling]

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@0767183 wrote:

 Would inventor or autocad handle doing a model like this better? 

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They might be better but the advice in all solid modelers is keep the sketches as simple as possible and pattern the features. So just sketch one square, extrude cut then pattern the faces of the extrusion to make the pattern.

Mark

[Phil.E]

Other applications might handle it differently, but this brings the question. Why do you need this model? Can you help me understand what you intend to do with it? That will help me answer the question.

In Fusion, it's better to use simple sketches, and do patterns like the grooves in your design using 3D modeling pattern commands. 

[0767183]

The goal is to design a Nemi style vacuum table for a small CNC at our university. We have a large nemi table on our onsrud machine and I want to be able to use the same gasket material. The goal is to cut this out of mdf and seal it or HDPE plastic. I want a 3D model to program off I’m of in either fusion it’s self or master cam. This was just my first rough draft lot of iterations to go. 

[Phil.E]

Got it, thanks. If the idea is to iterate on it, then Fusion or Inventor would be fine because they are parametric and that makes editing easier.

The advice for Fusion is to always avoid sketches that have big patterns, or those that break the profile into thousands of pieces.

[mihaicatalinr]

Hi Matt, 

I'm shocked! Apparently the solution you suggested with unchecking the Compatibility Mode, worked for me as well.

Now the program runs smoothly.  I didn't expect to be that easy. 

Thanks a mil.

Mihai 

[HughesTooling · Accepted solution]

@mihaicatalinr  I guess you missed my post #10, you could have fixed the problem a day earlier!

I seem to remember Windows sometimes after a program crashes it either gives you the option to run in compatibility mode or tells you it's setting the program to compatibility mode. So I think it's Windows changing the mode.

Mark

[mihaicatalinr]

Hi Mark,

My bad. Somehow I missed this message or I thought that I've already tried this solution. 

Apologies and thank you! 🙏 Fair play to you.

Cheers

Mihai

[jlewin]

I too have been suffering through abysmal performance that was solved by resetting the compatibility settings for the Fusion shortcut.

Prior to the reset, simply orbiting an empty scene would result in a multi-second lag and almost all other actions suffered from the same issue. After the clearing the Windows 8 Compat setting, everything works normally.

>So I think it's Windows changing the mode.

I don't believe this is the case. I haven't had any recent crashes in Fusion and have never seen Windows automatically force this setting on applications. I've worked on apps that crash non-stop and I've never had to reset this option for myself or customers and can't imagine any app developer being ok with an auto-handicap like this. Further, I certainly haven't been prompted to change compat settings or done so manually and yet Windows 8 Compatibility was turned on and almost certainly did so in the last few days. It seems more likely the installer went haywire and messed up the launch settings for the Fusion shortcut. 

Either way, clearing the setting gets my instance working again after days of frustration. Thanks for the fix!