Lightroom Classic not using above 16GB RAM?

Forum|Forum|1 year ago
February 2, 2025
4 replies
208 views

HI,

i7 PC, 32GB RAM, SSD

RTX3060 12GB

Latest Windows and LR updates and NVIDIA Creator Drivers.

My PC usually uses above 16GB RAM when needed for intensive Apps and Games.

If run HDR Merge Function on many DNGs it starts the create Preview process an gets to about 50% along the progress bar. But it then slows down to a very slow pace.

The CPU usuage drops to 5-14%, th GPU usage to zero, and RAM usuage hits a ceiling of about 15.9GB. It then sits their like this accessing the SSD at a very slow rate of 0.4 to 30Mbps and takes a very long time to complete the task, 10 of minmutes, if at all.

Any ideas why its not using all the 32GB available?

Is there a setting somewhere I am missing that caps RAM usage?

Windows

J

Jao vdL

Community Expert

How many images are you merging? You could be running out of GPU memory instead of main memory if you merge a lot at the same time. For HDR merge you really should never need more than about 5 images and even that is usually way overkill.

GoldingD

Legend

RTX3060 12GB

Oh, and the Photo Merge HDR would be using the CPU, the GPU, and the RAm, as well as other resources. You have 12GB of VRAM available (well much of it) to LrC for this. Adobe just loves using the GPU.

GoldingD

Legend

Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut out as that is just so much dead space to us non-Techs and it takes up vast amounts of scroll space making the reply less readable and less likely that others will bother with your post. Also large amounts of text in a post also render the Translate function inoperable...

Mostly interested in Library path, and Plug-ins active. But also verification of LrC version, and OS version.

GoldingD

Legend

Please post a screenshot of your LrC /Preferences/Performance/

Interested in GPU info, AND Camera RAW CACHE limit info.

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