Lightroom classic slow (5.16 GB) memory

Forum|Forum|9 months ago
June 27, 2025
2 replies
262 views

Hi,

I am using LightRoom classic on iMac and now days, it's very slow. EVen i restart my system, don't help.

I saw, memory uses is 5.16GB and my cache preview is only 12GB. What making my lightRoom slow.

Processor: 3.8 Ghz 8-Core Intel Core i7

Graphics: AMD Raden Pro 5500XT 8 GB

HDD available space: 133 GB

RAM: 16 GB.

This is affecting my client's delivery and appricate any one point out the issue.

Thannk you in advance!!

macOS

dj_paige

Legend

What actions in Lightroom Classic are slow? Please be specific.

Ian Lyons

Community Expert

Please provide a copy of your System Info. This can be obtained from the LrC Help > System Info menu item. Use the Copy button at top right corner of the System Info dialog to capture the info, then paste it into a reply post.

You should also describe which aspects of the application are slow, and whether this is new or not.

F

Flash and FlickerAuthor

Known Participant

Lightroom Classic version: 14.4 [ 202506051112-5918896a ]
License: Creative Cloud
Language setting: en-US
Operating system: Mac OS 15
Version: 15.5.0 [24F74]
Application architecture: x64
Logical processor count: 16
Processor speed: 3.8GHz
SqLite Version: 3.36.0
Built-in memory: 16,384.0 MB
Dedicated GPU memory used by Lightroom: 4,647.5MB / 8,176.0MB (56%)
Real memory available to Lightroom: 16,384.0 MB
Real memory used by Lightroom: 2,214.1 MB (13.5%)
Virtual memory used by Lightroom: 49,638.2 MB
Memory cache size: 337.5MB
Internal Camera Raw version: 17.4 [ 2272 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 744MB / 8191MB (9%)
Camera Raw real memory: 867MB / 16384MB (5%)

Cache1:
Preview1- RAM:22.0MB, VRAM:0.0MB, 0Y6A1308.CR3
Final2- RAM:365.0MB, VRAM:2,590.0MB, 0Y6A1313.CR3
Preview3- RAM:22.0MB, VRAM:0.0MB, 0Y6A1306.CR3
NT- RAM:409.0MB, VRAM:2,590.0MB, Combined:2,999.0MB

Cache2:
m:337.5MB, n:396.9MB

U-main: 81.0MB

Standard Preview Size: 1024 pixels
Displays: 1) 5120x2880

Graphics Processor Info:
Metal: AMD Radeon Pro 5500 XT
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/user1/Pictures/Lightroom/Lightroom Catalog-v13-3.lrcat
Settings Folder: /Users/user1/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Flickr

Config.lua flags:

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