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Before I hit render, I am comfortably using 3.4GiB/32GiB of memory just for Ubuntu, web browser and blender. 3.1/32GiB before I open blender and the scene I wish to render. Below is a screenshot of my view port before render, because maybe you guys will notice something obvious about my setup.

enter image description here

I am rendering in cycles, @4k, with experimental options turned on (necessary because of the adaptive subdivision modifier), on the GPU. When I hit render I get a the following memory utilization curve: enter image description here

I may have a lot of vertices, but 32GB is a lot of memory to consume within a 30 second period. Thanks for any input. Any idea on how I can identify if this is a memory leak, or how I can reduce my memory use?

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It seems that de noising was really messing me up. I set de noising to 0 (adaptive, based on anti-aliasing settings) and I was able to get memory consumption down. I'm not sure why I got the double hump pattern.

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