Lightroom v10.1.1 huge vram usage

Forum|Forum|5 years ago
February 5, 2021
5 replies
3526 views

Why does lightroom needs to use 23.2vram it's still slow?

I have gpu 3090 last driver version window 10 last version

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D Fosse

Community Expert

I'm seeing it too - but I suspect this might actually be by design, and that there's no problem to fix.

First of all, this only happens when you have the advanced setting "use GPU for image processing". If you uncheck that and just leave "use GPU for display", the VRAM usage immediately drops.

Second, I can see no ill effects from this. It never peaks fully, it always stops at 90% or so. No performance drop, no increased fan, nothing. Everything works perfectly. I wouldn't have noticed if I didn't go look for it. When I open other applications that need VRAM, it's released and they get what they need.

I recently replaced a 2GB Quadro P600 with a 5GB Quadro P2200. They both go to 90% and stop.

As for the "by design" part - there's an old saying: free memory is wasted memory. It's supposed to be used, it doesn't do anything sitting idle. So maybe that's just what Lightroom does, and there's no more drama to it.

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DjAligator14Author

Known Participant

For me there is performance drop and a huge one. If i have lr open with vram at max and start editing in premiere, my system would freeze and can't do anything. Premiere would start using gpu to 100%.

I don't know what adobe did but i should've note on what version it started this problem so that i would not update.

K

Klaazzzzz

Participating Frequently

Have the same issue: https://feedback.photoshop.com/conversations/lightroom-classic/lightroom-classic-vram-usage-impact-photoshop-performance/60217b5987976f6fb985e73e

With a 24GB graphics card it is even worse than with an 8GB graphics card. For now I've set within LR Use Graphics Processor to Custom, selected Use GPU for display and de-selected Use GPU for image processing. LR's VRAM hogging has way too much impact on other programs using the GPU memory as well.

Since other programs do not show this behaviour, I'd think that it is not purely an NVIDIA memory management thing, but Lightroom behaviour, or a combination (wondering if people with AMD graphics have the same issue).

Ian Lyons

Community Expert

As designed, LrC should use all available VRAM until another application requires a share of same. Unfortunatley, systems with large quantities of VRAM (typically 8GB and above) are not releasing the VRAM. Adobe are currently investigating why the VRAM is not being released in the expected manner. The issue also seems to be more prevalent on Windows systems than macOS.

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DjAligator14Author

Known Participant

It's been like this for couple good versions and still not even a little fix. It was working fine with older versions, too bad i didn't check which one.

Ian Lyons

Community Expert

Feel free to raise the issue on the Lightroom Classic Feedback forum https://feedback.photoshop.com/topics/lightroom-classic/5f5f2093785c1f1e6cc40872

If there's already a thread on the subject (I'm sure there is), then the moderator will merge your post into the thread.

KR Seals

Community Expert

It's confusing when you say VRAM 23.2. VRAM is the ram on the GPU. Are you talking about your RAM? and what is wrong with that when you have 128GB? Is Lightroom Classic working normally otherwise? Are you saying LrC is using 23.2 GB of RAM? Is LrC doing face detection or address lookup?

Ken Seals - Nikon Z 9, Z 8, 14mm-800mm. Computer Win 11 Pro, I7-14700K, 64GB, RTX3070TI. Travel machine: 2021 MacBook Pro M1 MAX 64GB. All Adobe apps.

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DjAligator14Author

Known Participant

I know the difference and it's vram, because of that if i don't close lr so that vram is free again, i can't use any programs because it will lag horrifing.