Participant

Question

I have major problems with Lightroom Classic. It runs very slowly.

Forum|Forum|1 day ago
April 21, 2026
5 replies
42 views

I have major problems with Lightroom Classic. It runs very slowly. Importing, using library and developing are very slow. Some develop processes, for instance crop and remove, are difficult to use.

My machine exceeds minimum system requirements. I have 32 GB RAM, 64—bit multiple-core processor, Lightroom and operating system (Windows 11) are on same solid-state drive. Fotos are in my own machine, not on a network drive. There is more than 20% free space on ssd drive. The graphics driver is updated. I have increased the Camera Raw cache size to 20 GB.

Photoshop runs normally and machine works normally with other programs.

I made another catalog and opened LrC with it. Performance was OK. My thought is that there is something wrong with my normal catalog. What should I do?

Info: Lightroom Classic version: 15.2.1 [ 202603161217-0bf813d9 ]

Operating system: Windows 11

Version: 11.0.26200

Application architecture: x64

System architecture: x64

Logical processor count: 20

Processor speed: 3,3GHz

SqLite Version: 3.36.0

Adobe GSDK Version: 1.4.0.212

CPU Utilisation: 1,0%

Power Source: Plugged In

Built-in memory: 32487,3 MB

Dedicated GPU memory used by Lightroom: 1088,6MB / 7995,0MB (13%)

Real memory available to Lightroom: 32487,3 MB

Real memory used by Lightroom: 12408,6 MB (38,1%)

Virtual memory used by Lightroom: 15703,4 MB

GDI objects count: 1263

USER objects count: 3676

Process handles count: 8423

Memory cache size: 1179,7MB

Internal Camera Raw version: 18.2.2 [ 2512 ]

Maximum thread count used by Camera Raw: 5

Camera Raw SIMD optimization: SSE2,AVX,AVX2

Camera Raw virtual memory: 1111MB / 16243MB (6%)

Camera Raw real memory: 1119MB / 32487MB (3%)

Cache1:

Final1- RAM:396,0MB, VRAM:332,0MB, 20260406-20260406_121846996_iOS.jpg

NT- RAM:396,0MB, VRAM:332,0MB, Combined:728,0MB

Cache2:

m:1179,7MB, n:389,6MB

U-main: 305,0MB

System DPI setting: 96 DPI

Desktop composition enabled: Yes

Standard Preview Size: 1936 pixels

Displays: 1) 1920x1080, 2) 1920x1200

Input types: Multitouch: No, Integrated touch: No, Integrated pen: Yes, External touch: No, External pen: Yes, Keyboard: No

Graphics Processor Info:

DirectX: NVIDIA Quadro RTX 4000 (32.0.15.8208)

Init State: GPU for Export supported by default

User Preference: GPU for Export enabled

Enable HDR in Library: ON

GPU for Preview Generation: Auto (S5_7)

H

Hanzi52Author

Participant

@AxelMatt

On the drive G: I have Lightroom backups. It is external drive. Only thing I sync with Onedrive are fotos from my Iphone,

H

Hanzi52Author

Participant

@AxelMatt

I tried to find a new graphic device driver from Nvidias website. I found none for RTX 4000, but one for RTX A4000 and installed it. LrC stopped totally. Now I am back to orginal one (32.0.15.8208)

H

Hanzi52Author

Participant

@Sameer K Thanks of your suggestions. I keep my catalog in C-drive. Lightroom and operating system (Windows 11) are on same solid-state drive.

The delays occur constantly. Sometimes there can be five minutes, when all works fine, then the program freezes back again. I have task manager running constantly. As far as I understand, the problem in not in CPU or in GPU. A screenshot shows the situation, when develop is on in LrC. (My Windows is in finnish.)

I updated Lightroom and it helped a little.

system info 20260422.txt

AxelMatt

Community Expert

What do you have stored on the USB drive G:? There’s a in high utilization.

Settings Folder: C:\Users\OMISTAJA\AppData\Roaming\Adobe\Lightroom

Do you sync your user account with OneDrive? If yes, please exclude ALL Lightroom relevant folders from syncing with OneDrive.

My System: Intel i7-8700K - 64GB RAM - NVidia Geforce RTX 3060 - Windows 11 Pro 25H2 -- LR-Classic 15 - Photoshop 27 - Nik Collection 8 - PureRAW 6 - Topaz Photo AI

AxelMatt

Community Expert

Info: Lightroom Classic version: 15.2.1 [ 202603161217-0bf813d9 ]
...
Graphics Processor Info:
DirectX: NVIDIA Quadro RTX 4000 (32.0.15.8208)
...

You’re using a outdated version of the graphic device driver. Goto NVidia’s website and search for the recent version for you type of card. Make shure taht you installed the recent Studio version of the driver. DON’T use the Game Ready version.

Check if you have buldin a CPU with an internal graphic processor. If yes, disable the processor internal graphic card. The internal GPU can sometimes caused several issues. Open the Windows Device Manager, right-click the card's name and choose Disable.

You’re also try the recent version of Lightroom Classic. In the 15.3 version some perfomance improvements are implemented.

My System: Intel i7-8700K - 64GB RAM - NVidia Geforce RTX 3060 - Windows 11 Pro 25H2 -- LR-Classic 15 - Photoshop 27 - Nik Collection 8 - PureRAW 6 - Topaz Photo AI

Sameer K

Community Manager

Hey, @Hanzi52. Welcome to the Lightroom Community. I'll need more info to help you figure this out. Please share the complete system info & update Lightroom Classic to the latest version via the Creative Cloud desktop app.

Where do you keep your Lightroom Classic catalog? Does the delay occur randomly, or after you've applied specific edits, or a number of edits, to the image, such as Lens Corrections, Denoise, and Masks?

As primary steps, try this:

Unplug additional displays & use only one by default.
Monitor the Task Manager > Performance Tab for any unexpected read and write operations.
Lightroom Classic > Catalog Settings > Metadata > Uncheck 'Automatically Write Changes Into XMP.'
Check this detailed response from our Expert: https://adobe.ly/4g6Cb4j

Let me know how it goes. Thanks!

Sameer K

(Type '@' and type my name to mention me when you reply)

Sign up

To post, reply, or follow discussions, please sign in with your Adobe ID.

Sign in to Adobe Community

To post, reply, or follow discussions, please sign in with your Adobe ID.

Scanning file for viruses.

This file cannot be downloaded