Memory leak with USD Composer template

axel.cocat · November 29, 2024, 10:32am

Hello,

My team is encountering very high memory usage with the USD Composer app template whilst rendering frames for an extended period of time via Movie Capture.

Here is a log file showing the RAM usage of the Kit process over time:

Summary

As you can see, after 13 hours of rendering, Kit has single-handedly filled the RAM, at which point Windows probably started killing random processes. This is not ideal, we’d very much like the ability to render overnight.

System specs:
Windows 10 Enterprise
i9-14900K
RTX 4090
64GB RAM

We’ve encountered the issue with the USD Composer app template with Kit 106.4 but as far as we can tell, it also happened with versions as far back as 106.2, so not a new bug with the latest releases.

Kind regards

AshleyG_NVIDIA · December 4, 2024, 8:49pm

Hey @axel.cocat

I appreciate the feedback! Ill make sure devs are aware of this

Richard3D · December 4, 2024, 8:52pm

Thanks for letting us know. This looks like a memory leak with either the Movie Capture extension itself, or USD Composer. We will investigate.

Richard3D · December 4, 2024, 9:09pm

I have filed a JIRA dev ticket to investigate. Could you provide us with the USD scene and some console logs on a second run to demonstrate the leak?

Richard3D · December 11, 2024, 4:09am

Just one question. You said RAM… do you mean VRAM or normal system RAM ?

axel.cocat · December 20, 2024, 4:41pm

Hi Ash and Richard, thanks for getting back to me.
Apologies for the delay, we’ve been trying to pinpoint the source of the leak. It turns out the issue also happens with a default empty scene without even running the movie capture. What we can tell so far is that the memory usage seems stable until we start using the UI : opening additional windows, changing the render settings, etc.
As far as we can tell this unfortunately looks like it’s coming from the UI system as a whole.
Yes Richard, I do mean normal RAM, not VRAM.
I will try this again on Kit 106.5 after the holiday break and report back.
I can provide a PAK ID if it helps get the ball rolling internally for you guys.

Kind regards,
Axel

Richard3D · December 20, 2024, 5:00pm

Thanks. Yes please try 106.5. We have recently identified a memory leak with Kit 106 as we have fixed it. It may be related to this and we will try to get more details.

Topic		Replies	Views
Massive memory leak under linux Samples & Examples	3	556	August 1, 2023
Kit 106.5 install fails Omniverse Technical Support	19	170	January 30, 2025
After SDG Generation GPU Overload in Kit Synthetic Data Generation (SDG)	5	53	September 23, 2024
USD Composer 2023.2.5 - Just lost everything when saving to USD Samples & Examples	4	312	May 6, 2024
Creating a kit-extension with USD plugin not registering .dll and .pyd files Omniverse Technical Support extension , usd , omniverse_extension	12	134	April 18, 2025
How to build complete composer from kit-app-template? Omniverse Technical Support	15	142	January 23, 2025
Unable to start USD composer and CODE Crash issue Samples & Examples	20	166	October 3, 2024
Composer installation error Samples & Examples	11	842	July 12, 2023
USD Composer 2023.1.1 launch fails - Kit hung error dialog Samples & Examples	12	751	September 7, 2023
How to persist changes to default camera Perspective settings, visible camera types, HUD, clipping range Omniverse Technical Support create	15	85	February 12, 2025

Memory leak with USD Composer template

Related topics