Lightroom: Very bad utilization of AMD Ryzen 1800X. Sluggish performance.

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  • Updated 9 months ago
  • (Edited)
I recently upgraded from an Intel i5 2500K system to a AMD Ryzen 1800X-based machine.

I'm having a blast editing 4K content in Premiere, but Lightroom? It's actually slower on the new setup, and I see many people complaining about Lightroom's bad performance on CPUs with more than four cores. It's actually killing me, it's at times a nightmare to work with.

A CPU utilization of only 30% when rendering previews and exports is something I can live with although it seems like a total waste as it should be "easy" to adress, but the sluggishness during editing is horrible. I believe have set up everything correctly. I have, after all, worked with Lightroom since your very first release, and profesionally for the last four years.

I'm always rendering 1:1 previews. These are stored on a 500GB Samsung 850 EVO SSD, along with the catalog.
All my active raw files are stored on a 1TB PM961 M.2 drive, with sequential read speeds of 2700MB/s. I have set up a 50GB Camera Raw Cache, and installed Adobe CC on this drive as well.
Windows 10 is a fresh install, and on a separate SSD.

All drivers and fw/bios are up to date.

This system has no bottlenecks.

My system specs:
CPU: AMD Ryzen 1800X (8-core 16-thread)
RAM: G.Skill RipjawsV 64GB 3200MHz CL16 (@2666MHz for now)
GPU: MSI 1080Ti FE
SSD: PM961 M.2, Samsung 850 EVO and two Intel SSDs.
OS: Windows 10

Any suggestions?
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Teddyen

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  • frustrated and angry.

Posted 2 years ago

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Simon Chen, Principal Computer Scientist

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"A CPU utilization of only 30% when rendering previews"
You can consider breaking up your 1:1 previews building into 2 or 3 batches of photos (based on the folders or other criteria) and kick off the 1:1 previews building menu command for each batch at the same time. This allows multiple 1:1 preview building tasks running concurrently in the background. This pushes Lr to more fully utilize the compute resources available to you in your setup. Lightroom is doing this under the hood for you automatically in the case of export. The drawback is that when the compute resource is more fully utilized for the preview building/export, the interactive responsiveness of Lr might suffer a little bit. But for folks who can walk away from the desk while the concurrent preview building is running, it is a good workaround that is within customer's control.

"the sluggishness during editing is horrible"
Can you describe the sort of develop editing that you do that felts sluggish?
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John R. Ellis, Champion

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Many users have reported severe performance problems running LR with more than 4 cores: https://feedback.photoshop.com/photoshop_family/topics/lightroom-clone-and-brush-tool-can-not-stress...

You could try restricting LR to running on 4 cores, as described here: https://feedback.photoshop.com/photoshop_family/topics/lightroom-clone-and-brush-tool-can-not-stress... .  That has helped some but not all.
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Simon Chen, Principal Computer Scientist

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Assuming that you are running Lr CC 2015.10 (Lr 6.10), you could do a test as described below and report back if you can get improved interactive editing performance:
  1. Open Lightroom.
  2. Invoke Lightroom > Preferences... menu command
  3. When the Preferences dialog appears, select the Presets tab.
  4. Click on the button labeled “Show Lightroom Presets Folder...”
  5. Lightroom will reveal the root preset folder in the Finder/Explorer.
  6. Now goto https://adobe.ly/2oqzWOX and download the config.lua file and copy it into the Lightroom preset folder that Finder/Explorer selected at step 5. The config.lua file will set a ratio (<=1.0, default is 1.0) on the maximum number of concurrent threads that Lr would use as relative to the total number logical CPU cores on the machine.
  7. Relaunch Lr. If you did step 1 though step 6 correctly, you should see the following entry reported in Lightroom's System Info dialog, which will essentially instruct Lr to not use more than the number of physical CPU cores of threads plus 1.
Config.lua flags: 
Develop.AdjustMaximumThreadCount = 0.51

     8. Now do your normal thing in Lr and report back your experience.You can tweak the value of "AdjustMaximumThreadCount" in the config.lua file to see if things changes for you.
     9. Remove or rename the config.lua from the Lightroom preset folder after the experiment.
(Edited)
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Lee Bennett

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Thanks for the swift feedback Simon. Probably been a busy day for you.

So far so good, very snappy, with the flag in place. Will try without tomorrow.

Edit to my original post: I did mean to say "For anyone who has upgraded upgraded to Lightroom Classic CC (v7.0)" not "2015.12 Classic CC"
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Whayne Padden

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Same issues here on a very high end Ryzen 7 1700x system, woeful performance. This file helped quite a bit, but it's still not as good as it should be.
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Whayne Padden

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I spoke too soon, the performance is appalling, it's barely usable. Even the graphics processor makes it worse despite being a GTX1080i. Can't believe how bad this is, should never have upgraded.
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Martijn Rengelink

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Jesus christ this is just pathetic. I've invested 2500 euro in a new system and Lightroom throws me back to the stone age. I'm not using this software for some cute familypictures Adobe, get it together.

Sadly the config file does not work for me. (Thanks for the help though!)
What is a good (non-adobe) alternative to Lightroom?
(Edited)
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Michael Skerritt

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Hi all. Well I can report that I am having issues as well with LRcc. I have the photography plan since it started but for some strange reason on the top left of my screen it says Adobe lightroom 2015? I am running the AMD 1950x on an Asus Zenit extreme motherboard with 64Gb of 3200Ghz G Skills memory. It wont run at its rated speed of 3200Ghz the best i can achieve is 3066GHz! I also sometimes get an error when I load up LR and I must click to try to load LR again? I also have A problem where the import screen pops up randomly on its own this happens about every 30 seconds or so. I don't remember having these before with this setup I have it must be the latest updates that is causing it.
Please advise.
Mike  
(Edited)