topic Re: GPU Memory Not Freeing Up After Render in Arnold for Maya Forum

GPU Memory Not Freeing Up After Render

Isaac.miller101 — Mon, 02 May 2022 22:48:07 GMT

With each consecutive Arnold render, my GPU memory gets used until all 8 gigs are occupied and it is forced to abort. It's treating my VRAM as single use and only becomes available again after restarting Maya.

1.3 gig scene
RTX3070 8gig
Up to date studio driver (also tried gaming driver).
Same results on MtoA5.1.0, Arnold Core 7.1.0.0 and MtoA 5.0.0.1, Arnold Core 7.0.0.0

I've cleared caches manually and flushed caches in Maya. I also tried to pre-populate GPU cache but it was taking so long I had to leave it overnight and it failed. Googled and searched forums but can't seem to find any resolution. Attached is a succesful render and then a failed render, along with my render settings.

Any help appreciated!

Re: GPU Memory Not Freeing Up After Render

thiago.ize — Mon, 02 May 2022 23:08:32 GMT

Does it stop leaking memory if you remove the imager_denoiser_optix?

Re: GPU Memory Not Freeing Up After Render

thiago.ize — Mon, 02 May 2022 23:11:48 GMT

Also, it wasn't clear: did you also test with the latest Arnold? It's currently at 7.1.1.1.

Re: GPU Memory Not Freeing Up After Render

Isaac.miller101 — Tue, 03 May 2022 00:49:25 GMT

Hi @thiago.ize! Thanks for your response. No, the problem persists regardless.

Re: GPU Memory Not Freeing Up After Render

Isaac.miller101 — Tue, 03 May 2022 00:53:23 GMT

@thiago.ize 7.1.1.1 wasn't actually available last time was was trying to solve this issue, so in the spirit of trying to make sure everything is good, I did a clean install of Maya, Arnold + a new studio driver update from NVIDIA. Before doing any renders I pre-populated the GPU Cache and the unfortunatly the problem persists.

Re: GPU Memory Not Freeing Up After Render

thiago.ize — Tue, 03 May 2022 05:36:56 GMT

Do you mind sharing your scene so we can try and reproduce the problem on our end?

Re: GPU Memory Not Freeing Up After Render

Isaac.miller101 — Tue, 03 May 2022 05:55:19 GMT

Sure, it's happening with every scene (new and old), so I'm not sure it will help, but I will send one through anyway. Thanks!

P.S. I tried attaching .MB file but it only accepted .MA.

Re: GPU Memory Not Freeing Up After Render

thiago.ize — Tue, 03 May 2022 06:06:45 GMT

Thanks, I'll give this a try tomorrow. By the way, for future reference you can zip the file and then you'll be able to upload whatever you want.

Re: GPU Memory Not Freeing Up After Render

Isaac.miller101 — Tue, 03 May 2022 06:39:37 GMT

Thanks man, I appreciate your help.

Re: GPU Memory Not Freeing Up After Render

thiago.ize — Tue, 03 May 2022 21:52:50 GMT

I wasn't able to reproduce the memory leak. First off, can you confirm it's supposed to render black (I think there are no lights)? And how are you rendering each time: ARV stop and start? Render sequence? Different scenes without restarting maya?

Re: GPU Memory Not Freeing Up After Render

Isaac.miller101 — Wed, 04 May 2022 00:25:35 GMT

Sorry I just removed the world light because it was connected to a HDRI that you wouldn't have. It's happening with every scene. No I am rendering just one scene. Tried rendering current frame, sequences also just opened arnold render view and clicking the "play" button, then stopping it once it's complete. Check out my screencast.

Re: GPU Memory Not Freeing Up After Render

Isaac.miller101 — Wed, 04 May 2022 00:26:56 GMT

https://knowledge.autodesk.com/support/maya/troubleshooting/caas/screencast/Main/Details/ce271eae-0da6-401c-bcaa-9792c92687cb.html

Re: GPU Memory Not Freeing Up After Render

thiago.ize — Wed, 04 May 2022 05:12:25 GMT

Thanks for the video, it makes it very clear what you're doing 🙂

I can get memory being used for the first two or so renders, but after that it seems to stop increasing. It's not as bad as what you're experiencing, but maybe that's a good enough reproducer for us, as I'd have hoped gpu memory would go completely back down after ending the render. We'll keep on investigating on our end. Thanks!

Re: GPU Memory Not Freeing Up After Render

Isaac.miller101 — Wed, 04 May 2022 05:16:57 GMT

No problem, glad you were able to see some progress. I really appreciate the help.

Re: GPU Memory Not Freeing Up After Render

Isaac.miller101 — Sun, 04 Dec 2022 02:55:27 GMT

Hi @thiago.ize, were you able to figure out what might be happening? It's been incredibly debilitating. I had to move to rendering in Blender.

Re: GPU Memory Not Freeing Up After Render

thiago.ize — Wed, 07 Dec 2022 05:36:56 GMT

No, we were not able to figure out the issue as we could not reproduce the memory leak past the first couple renders. We are in the midst of a major GPU rewrite as we upgrade from OptiX 6 to 7 so it's possible when that's completed it might fix this for you or at least make it easier for us to fix this as we now have more control over memory usage in Optix 7. Unfortunately we can't give an ETA.

Re: GPU Memory Not Freeing Up After Render

designimation — Thu, 08 Dec 2022 18:02:22 GMT

Maya has this issue also.

https://forums.autodesk.com/t5/maya-shading-lighting-and/arnold-memory-leak-running-standalone-arnold-as-a-solution/m-p/11605020/highlight/false#M37910

Re: GPU Memory Not Freeing Up After Render

alikasb — Sat, 16 Mar 2024 10:12:17 GMT

I have same problem in 3dsmax 2024 Arnold render. GPU memmory is full and Arnold r render start rendering very slow. Swichng to other rendering or closing scene memory GPU still full. Only after closing 3dsmax memmory GPU is about 0 precents.

Re: GPU Memory Not Freeing Up After Render

CiroCardoso3v — Tue, 19 Mar 2024 06:47:36 GMT

Are you using the latest version? Perhaps a log could help with what is happening.

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/How-to-get-an-Arnold-log-file-in-3ds-Max.html

Re: GPU Memory Not Freeing Up After Render

alikasb — Tue, 19 Mar 2024 09:49:51 GMT

Yes Latest (or at least one of the latests). I Instalet 3dsmax about month ago.