Unresponsive render settings since upgrade to Vray 5

[GregCooper]

Since upgrading, every time I open my render settings there is a 10-20s delay before the window is responsive. Pretty frustrating, tried other renderers, only happening with V-Ray.

[yolov]

Does this happen with other renderers?
Do you have the render settings window open when Maya starts?
What Maya version is this?
Usually it becomes responsive after all plugins are loaded, so I don't think it's related to V-Ray specifically.

[GregCooper]

Only happening with V-Ray. Render settings isn’t open when Maya starts. Version - Maya 2020.2.

this is happening every single time I open the render settings window. Maya is usually unresponsive while loading plugins after first opening but this issue is during regular use

[yolov]

So this is every time you call the render settings window, not just the first time after staring Maya?
If so, can you get us some details:
OS, Maya version (this is already in your post - 2020.2).
Is this a regular V-Ray installation (using the installer) or a .zip install deployment?
Is Maya deployed locally or on a network? Is V-Ray deployed locally or over a network?

[GregCooper]

Okay more clues. This seems to be only happening when GPU rendering, I tried switching back to CPU just to test and I don't get the delay. Also the length of the delay until the window is responsive seems to correlate to scene size. A new scene with a few primitives and one light still has a delay but its much shorter.

Also if I open the render settings window while a render is actually running (a gpu render) this just seems to freeze everything up until the render completes

Windows 10 ( 10.0.18363 build 18363)
Maya 2020.2
regular V-ray 5 installation
Maya is on a local machine
AMD threadripper 1920x
4x 1080ti GPUs
nvidia driver 445.87

[yolov]

Okay, that gets us somewhere, thanks for the info.
Let me discuss with the devs and see what we come up with.
We may need more information from you.

[yolov]

Can you check if you see the same slowdown if you open up the GPU Device Select tool directly?
https://docs.chaosgroup.com/display/...seforRendering

Basically, in the interface we list the devices same as this tool does, so it may be related.
Also - what cards do you see there, can you post a list or a screenshot?

[GregCooper]

Hey yolov just checked, GPU device select is fine. Screen attached.

[Mihail.Djurev]

Hi, we can't seem to reproduce the issue on our end.

However, Maya has a MEL profiler that could help us: https://knowledge.autodesk.com/suppo...F9D74-htm.html
Could you start it before the slowdown and stop it afterwards so it records whatever is slowing things down?

Hopefully, the recorded data will be enough to pinpoint the issue.