[4.7.6] Editor: Very high CPU load on idle

Development Asset Creation FX
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1

Hi there,

Suddenly UE4Editor.exe consumes large parts of the CPU even in idle state (‘realtime’ is not checked in viewport). The VR preview isn’t usable anymore because of this, there are 2 second long ‘hickups’ without any new frame.

1551×448 214 KB

What is the editor doing in the background? Why is it suddenly so slow?

PS: It’s a quad core i5 Haswell GHz, never had any performance problem with the UE4 editor in the last weeks.

2

Hey ,

How long have you had the Editor running in the background? I’ve noticed a very slight change in CPU and memory usage when minimizing and maximizing the Editor from my task bar. I’d like to know how much you’ve been using the editor, approximately how many times you’ve minimized it and if you’ve been working on and off of the project all day or the past few days?

Also, have you tried saving your project and restarting your PC? Does that come to the same results?

Looking forward to hearing from you, thanks! :slight_smile:

3

Hi ,

thanks for investigating. I had the editor open for approx. 10 Minutes and restarted it several times.

4

Hey ,

I left the Editor open all night, my CPU and memory usage is at the same as it was last night when I checked it last. I have noticed that depending on how intensive your project is, the more CPU and memory usage there is. I see that on the screenshot you provided me, that it’s just a blue sky. Does this project have a lot of assets or particle effects, anything of that nature within it? Or is it just an empty skybox? Is this the only project this occurs on?

Thank you!

5

Hi ,

I moved the viewport to the sky just for testing in this example. The project itself is not extremely complex, it’s comparable to the blueprint office sample.

The problem didn’t come up on another system so I can live with it for now. Many thanks for your support.

Maybe you could point me to a log file or something just to investigate this further if it happens again?

6

You’re welcome ,

I’ll keep watching my task manager. If I can figure out a reproduction for this, I’ll send it to our developers for additional review. Let me know if it happens again, or if it gets worse.

To watch the memory usage of your project, you’ll want to press the drop-down within the viewport and select Stat > Memory. That should give you the information that you want.

You can also bring up the console with ~ and enter memreport -full. Rename the extentions on the .memreport file to .txt in the [ProjectName]/saved/Profiling/MemReports - - this one is more of a snap-shot of the memory usage.

Cheers!!