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1 Message

 • 

310 Points

Tue, Oct 31, 2017 8:53 AM

Lightroom Classic: High CPU usage makes it unusable during export

After latest Lightroom Classic CC I almost can't work in Lightroom during export as it's using around 90% off mu CPU. Maybe exporting itself is a bit faster but when exporting 2000 pics I'm unable to work for about half an hour as there are huge lags. In the end I would rather prefer slower export working in a background and still have ability to work with pics without such noticable slow down. It was much better balanced before updating to Classic CC.
My CPU: Intel Core i7-6700K (4 cores, od 4.00 GHz do 4.20 GHz, 8 MB cache)

Responses

150 Messages

 • 

2.9K Points

3 years ago

I would rather Lightroom will use 100 percent all the time. At the moment it is using most of the time between 10 to 30 percent. And the most frustrating thing is the performance degradation over time. After restart lightroom will reach 90 percent but after 10 minutes of working it goes down to 10 to 30 percent. This is more noticeable the more cores you have. The best way to replicate it is export 100 images after restart. Time it and look at the cup graph. Then do it again immediately after you will see it takes much longer and the cpu will not reach 90% any more... W10 i7 5960X 8 cores

3 Messages

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206 Points

2 years ago

Hi! Any news on that?

I noticed the same odd behaviour on my new PC and I am very disappointed that one can not find any solution online! Disabling GPU does not help, changing process priority before export does not help, even assigning dedicated CPU-Cores to Lightroom does not help... If I monitor the CPU load with just some cores assigned to Lightroom, I can clearly see that the unused cores have no load. But still the PC is more or less blocked. After starting the export the whole system is unusably slow. It is nearly impossible to just move the mouse cursor.

Here a rough overview on system specs:
Lightroom Classic 8.1 on fully updated WIN10 Professional 64bit,
Z390 chipset, 8 core i9-9900K, 32GB RAM,
RTX2080TI,
Samsung M2 SSD for catalog, Samsung SATA SSD for raw files.

Any update or further tip is much appreciated. Maybe some Adobe staff could comment.

Thanks
Thomas



3 Messages

 • 

206 Points

Even a brand new catalog with just 72 images shows the same issue on export.

Some more detailed system info. Maybe it helps...

Lightroom Classic version: 8.1 [ 1200465 ]
License: Creative Cloud
Language setting: en
Operating system: Windows 10 - Business Edition
Version: 10.0.17134
Application architecture: x64
System architecture: x64
Logical processor count: 16
Processor speed: 3,6 GHz
Built-in memory: 32686,1 MB
Real memory available to Lightroom: 32686,1 MB
Real memory used by Lightroom: 4450,3 MB (13,6%)
Virtual memory used by Lightroom: 5498,1 MB
GDI objects count: 728
USER objects count: 2296
Process handles count: 2168
Memory cache size: 593,8MB
Internal Camera Raw version: 11.1 [ 112 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 1216MB / 16343MB (7%)
Camera Raw real memory: 1218MB / 32686MB (3%)
System DPI setting: 144 DPI (high DPI mode)
Desktop composition enabled: Yes
Displays: 1) 3840x2160, 2) 3840x2160
Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: Yes, Keyboard: No
Graphics Processor Info: 
DirectX: NVIDIA GeForce RTX 2080 Ti (25.21.14.1771)
Application folder: C:\Program Files\Adobe\Adobe Lightroom Classic CC
Library Path: C:\Users\Thomas\Pictures\testCatalog\testCatalog\testCatalog.lrcat
Settings Folder: C:\Users\Thomas\AppData\Roaming\Adobe\Lightroom
Installed Plugins: 
1) AdobeStock
2) Canon Tether Plugin
3) Facebook
4) Flickr
5) LogiOptions
6) LRT Export 5
7) Nikon Tether Plugin
Config.lua flags: None
Adapter #1: Vendor : 10de
Device : 1e07
Subsystem : 37a91458
Revision : a1
Video Memory : 11048
Adapter #2: Vendor : 1414
Device : 8c
Subsystem : 0
Revision : 0
Video Memory : 0
AudioDeviceIOBlockSize: 1024
AudioDeviceName: Lautsprecher (2- High Definition Audio-Gerät)
AudioDeviceNumberOfChannels: 2
AudioDeviceSampleRate: 48000
Build: 12.1x4
Direct2DEnabled: false
GL_ACCUM_ALPHA_BITS: 16
GL_ACCUM_BLUE_BITS: 16
GL_ACCUM_GREEN_BITS: 16
GL_ACCUM_RED_BITS: 16
GL_ALPHA_BITS: 0
GL_BLUE_BITS: 8
GL_DEPTH_BITS: 24
GL_GREEN_BITS: 8
GL_MAX_3D_TEXTURE_SIZE: 16384
GL_MAX_TEXTURE_SIZE: 32768
GL_MAX_TEXTURE_UNITS: 4
GL_MAX_VIEWPORT_DIMS: 32768,32768
GL_RED_BITS: 8
GL_RENDERER: GeForce RTX 2080 Ti/PCIe/SSE2
GL_SHADING_LANGUAGE_VERSION: 4.60 NVIDIA
GL_STENCIL_BITS: 8
GL_VENDOR: NVIDIA Corporation
GL_VERSION: 4.6.0 NVIDIA 417.71
GPUDeviceEnabled: false
OGLEnabled: true
GL_EXTENSIONS: GL_AMD_multi_draw_indirect GL_AMD_seamless_cubemap_per_texture GL_AMD_vertex_shader_viewport_index GL_AMD_vertex_shader_layer GL_ARB_arrays_of_arrays GL_ARB_base_instance GL_ARB_bindless_texture GL_ARB_blend_func_extended GL_ARB_buffer_storage GL_ARB_clear_buffer_object GL_ARB_clear_texture GL_ARB_clip_control GL_ARB_color_buffer_float GL_ARB_compatibility GL_ARB_compressed_texture_pixel_storage GL_ARB_conservative_depth GL_ARB_compute_shader GL_ARB_compute_variable_group_size GL_ARB_conditional_render_inverted GL_ARB_copy_buffer GL_ARB_copy_image GL_ARB_cull_distance GL_ARB_debug_output GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_derivative_control GL_ARB_direct_state_access GL_ARB_draw_buffers GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_draw_elements_base_vertex GL_ARB_draw_instanced GL_ARB_enhanced_layouts GL_ARB_ES2_compatibility GL_ARB_ES3_compatibility GL_ARB_ES3_1_compatibility GL_ARB_ES3_2_compatibility 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GL_ARB_sparse_texture2 GL_ARB_sparse_texture_clamp GL_ARB_spirv_extensions GL_ARB_stencil_texturing GL_ARB_sync GL_ARB_tessellation_shader GL_ARB_texture_barrier GL_ARB_texture_border_clamp GL_ARB_texture_buffer_object GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_buffer_range GL_ARB_texture_compression GL_ARB_texture_compression_bptc GL_ARB_texture_compression_rgtc GL_ARB_texture_cube_map GL_ARB_texture_cube_map_array GL_ARB_texture_env_add GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar GL_ARB_texture_env_dot3 GL_ARB_texture_filter_anisotropic GL_ARB_texture_filter_minmax GL_ARB_texture_float GL_ARB_texture_gather GL_ARB_texture_mirror_clamp_to_edge GL_ARB_texture_mirrored_repeat GL_ARB_texture_multisample GL_ARB_texture_non_power_of_two GL_ARB_texture_query_levels GL_ARB_texture_query_lod GL_ARB_texture_rectangle GL_ARB_texture_rg GL_ARB_texture_rgb10_a2ui GL_ARB_texture_stencil8 GL_ARB_texture_storage GL_ARB_texture_storage_multisample GL_ARB_texture_swizzle GL_ARB_texture_view GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_transform_feedback_instanced GL_ARB_transform_feedback_overflow_query GL_ARB_transpose_matrix GL_ARB_uniform_buffer_object GL_ARB_vertex_array_bgra GL_ARB_vertex_array_object GL_ARB_vertex_attrib_64bit GL_ARB_vertex_attrib_binding GL_ARB_vertex_buffer_object GL_ARB_vertex_program GL_ARB_vertex_shader GL_ARB_vertex_type_10f_11f_11f_rev GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_ARB_window_pos GL_ATI_draw_buffers GL_ATI_texture_float GL_ATI_texture_mirror_once GL_S3_s3tc GL_EXT_texture_env_add GL_EXT_abgr GL_EXT_bgra GL_EXT_bindable_uniform GL_EXT_blend_color GL_EXT_blend_equation_separate GL_EXT_blend_func_separate GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_compiled_vertex_array GL_EXT_Cg_shader GL_EXT_depth_bounds_test GL_EXT_direct_state_access GL_EXT_draw_buffers2 GL_EXT_draw_instanced GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXTX_framebuffer_mixed_formats GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_framebuffer_object GL_EXT_framebuffer_sRGB GL_EXT_geometry_shader4 GL_EXT_gpu_program_parameters GL_EXT_gpu_shader4 GL_EXT_multi_draw_arrays GL_EXT_packed_depth_stencil GL_EXT_packed_float GL_EXT_packed_pixels GL_EXT_pixel_buffer_object GL_EXT_point_parameters GL_EXT_polygon_offset_clamp GL_EXT_post_depth_coverage GL_EXT_provoking_vertex GL_EXT_raster_multisample GL_EXT_rescale_normal GL_EXT_secondary_color GL_EXT_separate_shader_objects GL_EXT_separate_specular_color GL_EXT_shader_image_load_formatted GL_EXT_shader_image_load_store GL_EXT_shader_integer_mix GL_EXT_shadow_funcs GL_EXT_sparse_texture2 GL_EXT_stencil_two_side GL_EXT_stencil_wrap GL_EXT_texture3D GL_EXT_texture_array GL_EXT_texture_buffer_object GL_EXT_texture_compression_dxt1 GL_EXT_texture_compression_latc GL_EXT_texture_compression_rgtc GL_EXT_texture_compression_s3tc GL_EXT_texture_cube_map GL_EXT_texture_edge_clamp GL_EXT_texture_env_combine GL_EXT_texture_env_dot3 GL_EXT_texture_filter_anisotropic GL_EXT_texture_filter_minmax GL_EXT_texture_integer GL_EXT_texture_lod GL_EXT_texture_lod_bias GL_EXT_texture_mirror_clamp GL_EXT_texture_object GL_EXT_texture_shared_exponent GL_EXT_texture_sRGB GL_EXT_texture_sRGB_R8 GL_EXT_texture_sRGB_decode GL_EXT_texture_storage GL_EXT_texture_swizzle GL_EXT_timer_query GL_EXT_transform_feedback2 GL_EXT_vertex_array GL_EXT_vertex_array_bgra GL_EXT_vertex_attrib_64bit GL_EXT_window_rectangles GL_EXT_import_sync_object GL_IBM_rasterpos_clip GL_IBM_texture_mirrored_repeat GL_KHR_context_flush_control GL_KHR_debug GL_EXT_memory_object GL_EXT_memory_object_win32 GL_EXT_win32_keyed_mutex GL_KHR_parallel_shader_compile GL_KHR_no_error GL_KHR_robust_buffer_access_behavior GL_KHR_robustness GL_EXT_semaphore GL_EXT_semaphore_win32 GL_KTX_buffer_region GL_NV_alpha_to_coverage_dither_control GL_NV_bindless_multi_draw_indirect 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GL_KHR_blend_equation_advanced_coherent GL_OVR_multiview GL_OVR_multiview2 GL_SGIS_generate_mipmap GL_SGIS_texture_lod GL_SGIX_depth_texture GL_SGIX_shadow GL_SUN_slice_accum GL_WIN_swap_hint WGL_EXT_swap_control

Adobe Administrator

 • 

8.6K Messages

 • 

122.4K Points

2 years ago

This behavior is expected. Changes were made in a previous version to more aggressively use CPU cores during the Export operation. Export takes priority over local operations to facilitate much faster exports. 
Adobe Photography Products

Quality Engineering - Customer Advocacy

70 Messages

 • 

1.4K Points

Not good at all. A much less aggressive CPU usage would be much better. Even the mouse stops moving... Imagine, users want to work on another tasks during a lengthily export!
The IT team needs to reconsider things from the user's point of view, not regarding the export thread's performance!

443 Messages

 • 

6.6K Points

I love the fact that LR now uses all my cpu during export - gets it over much faster! I have a cup of coffee, read a book (remember those things made of paper?), or go to bed while its doing its stuff!

Bob Frost

70 Messages

 • 

1.4K Points

Rober Frost,
In terms of computing, the export thread should not use that much CPU. LR will use all of your CPU either.
On the other hand, there are countless LR users who simply want to start working on the next set of photos (so they can enjoy their book and coffee sooner).

55 Messages

 • 

900 Points

I have to export 1500 images  - it doesn't matter whether they are exported a bit later. I could start that in the morning and meanwhile work on other jobs inside and outside of LR. BUT I can't do anything useful for a few hours, because LR is even slowing down my browser and email-client. So I have to postpone the export for during the night.

After all I have the final images later (next morning), than I would have had them if the export ran in the background during the day (afternoon). So anyone who came up with that CPU-Usage Idea obviously didn't give much thought to real live. Does Adobe ever test anything in real life environments? Seems to me, they just rely on users wasting their time in forums instead of being productive.

I'd say make Export a lower CPU-priority by default with an option to switch up and block the rest of your machine, if the user so chooses.

1 Message

 • 

62 Points

I moved from a 2009 Mac Pro to a brand new iMac i9 with 40GB of RAM working off a 1TB SSD.  My 2009 was almost as fast and never had issues like this using the newer LR Classic.  I can't even write a text message and have trouble mousing while trying to export just 800 images.  Same concerns here - I can settle for a slower export. But I can't stop working for hours at a time throughout the day.  My CPU usage on Activity monitor registers anywhere from 750% to +1400% - I don't even know how that's possible

Champion

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5.3K Messages

 • 

95.7K Points

"My CPU usage on Activity monitor registers anywhere from 750% to +1400% - I don't even know how that's possible"

In % CPU column of Activity Monitor, 100% = one virtual (logical) core / thread / processor (industry terminology is not consistent).  So on an Intel computer with 16 virtual (logical) cores / threads / processors, the % CPU column could show a maximum of 1600% for Lightroom.

But in the system totals shown at the bottom, System + User + Idle total to 100%.  How's that for confusing?

151 Messages

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3.1K Points

Rikk - Why on earth design a behaviour such that 'After restart lightroom will reach 90 percent but after 10 minutes of working it goes down to 10 to 30 percent.'?

3 Messages

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206 Points

2 years ago

Thanks Rikk for the reply!

In the meantime I did some more investigation. When I limit CPU affinity to e. g. 8 out of 16 logical CPUs, I managed to work in Windows (mail, explorer, browsing, youtube, etc.) more or less flawless. There is some lag sometimes when moving the mouse though.
Nevertheless, it is cumbersome to change affinity using Windows Task Manager all the time. You (Adobe) should add some kind of preference value to limit CPU usage inside Lightroom. Not everyone is looking at the progressbar during export. We rather want to do some additional work, even if it is only watching some tutorials on using Adobe products :-)

OK, thanks again.
I will live with the workaround for now. I am curious about any further update on that issue.

Regards
Thomas

Champion

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5.3K Messages

 • 

95.7K Points

"it is cumbersome to change affinity using Windows Task Manager all the time."

A late reply that might be useful to you and others: You can create a .bat file that will start LR restricted to a subset of virtual/logical processors. For example:

start /affinity fff "c:\Program Files\Adobe\Adobe Lightroom Classic\Lightroom.exe" c:\Users\john\Pictures\Lightroom\Test\Test-2.lrcat

starts LR restricted to 12 virtual/logical processors / threads. The "fff" is a hexadecimal mask specifying the particular processors to use.
@echo off
REM Starts Lightroom with a process affinity. Replace 7 below with 1, 3, 7, 15, 31, 
REM 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, or 65535, to restrict
REM Lightroom to use 1, 2, 3, ..., 16 virtual/logical processors.
powershell "& ""c:\Program Files\Adobe\Adobe Lightroom Classic\Lightroom.exe"""
powershell sleep 10
powershell $P = Get-Process Lightroom; $P.ProcessorAffinity=7; $P.ProcessorAffinity; $P.Id

(The original commands I provided no longer work with Lightroom for some obscure reason I can't figure out.)

4 Messages

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124 Points

I'm expecting it to use all my cores, but not on such priority that I can hardly move my mouse cursor...

626 Messages

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7.8K Points

UNIX (the OS core of MacOS) is not a priority based, interrupt driven OS. Adobe would have to offer a setting to limit the number of parallel threads. 

3 Messages

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226 Points

2 years ago

This needs a setting or a fix. What I love about Lightroom is being able to work with it during exports to continue work on live events. Right now the workaround only allows you so somewhat use other stuff but using Lightroom during exports is not possible. The strange thing is my older desktop works fine during exports and my newer more powerful laptop is unusable.

Desktop:
i7-7700 CPU 4 cores @ 4.60Ghz
32GB Ram
GTX260 GPU
System and catalog on same ssd
Images on platter 4tb hard drive exporting to same

Laptop:
i7-8750H 6 cores @ 2.2Ghz
32GB Ram
Nvidia Quatro P600
System and catalog on main Nvme
Files on second Nvme drive
Exporting to anything gives the same results

3 Messages

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226 Points

2 years ago

So new development here.

I contacted Adobe support again and the agent cleared the caches, reset preferences, set a couple more permissions on the Lightroom folders, set Lightroom to run as admin. No luck.

I tried a bluetooth mouse instead of the touchpad, it was slightly better, tried a wired mouse and it was perfect.

So we turned to the touchpad, I had the latest drivers but there was a firmware upgrade. Applied it, rebooted but still no luck.

I called Lenovo support and by the time they answered the phone everything started working perfectly. Go figure, maybe it was the firmware but it took some time to set in??? Well my problem is resolved.

2 Messages

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162 Points

a year ago

This reply was created from a merged topic originally titled Lightroom Classic 8.3.1: Maxing out my CPU during export, can't do any work while....

Export is maxing out my CPU, making it impossible to do anything else in LR or PS while the export is running. Everything else on my PC runs super slowly while the export is running. I don't mind if exports take longer, but I need to be able to kick off an export then go do something else with my PC. It's also preferable to me to be able to do other tasks within LR while the export is running, over having a slightly faster export time.

7 Messages

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212 Points

a year ago

This reply was created from a merged topic originally titled Lightroom Classic: Export makes pc slow.

Exporting images makes pc almost unusable, in the past the exports were much slower but I could perform other tasks on my PC, sometimes something as simple as watching YouTube on my secondary monitor. The new version is much faster but renders my i7 8700k, gtx 1080 and 32gb if ram useless as far as multitasking. Watching a YouTube tutorial while exporting raw files to JPEGs constantly causes YouTube, mouse and windows to freeze as well as an occasional black screen flash.

4 Messages

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132 Points

a year ago

This reply was created from a merged topic originally titled Lightroom Classic: GPU Acceleration for Lightroom Classic Export Operations.

Would it be possible to speed up Lightroom Classic Export operations with GPU acceleration?
It's great to have some GPU support in the develop module, but exporting takes nearly all my CPU resources. Why has this not been done already?


No automatic alt text available

70 Messages

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1.4K Points

a year ago

This reply was created from a merged topic originally titled Limit the CPU for export thread.

In Lightroom 8, when exporting virtually nothing can be done due to excessive CPU usage. Even the mouse cursor is frequently frozen for seconds.
I suggest limiting the CPU usage for the Export thread (as it was in earlier versions).

5 Messages

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114 Points

a year ago

This reply was created from a merged topic originally titled System freezing (and crashing) with 100 % CPU during export.

Ever since I updated Lightroom to the current version (Lightroom Classic version: 8.3.1), I haven't been successful in exporting pictures after edits. Within seconds of the the export kicking off, the machine freezes up and the screen goes blank. I started monitoring the CPU during these windows and found that the CPU was pegged at a 100 % and Lightroom was the heaviest user. I understand that this was a feature add for faster processing and better utilization of the system resources but in cases like mine, I am unable to finish the job because the system wouldn't recover after this freeze. Only a hard reboot brings in back up. After playing around a lot with the settings (performance tuning etc), I finally found a workaround - Just before the export, I went to the system Task Manager > Details > Lightroom.exe and set the affinity so that it doesn't use all the CPU cores. That way, during the export, the system wasn't hitting the 100 % CPU mark and the export finished. It has become very frustrating as I had to hard reboot my machine about 15 times before I got here. Many of us don't have the luxury of dedicating one machine for Lightroom use only. I can't have one software take up all the juice and crash the entire system.

My machine specs - 

Lightroom Classic version: 8.3.1 [ 201905241238-dcd7e2de ]
License: Creative Cloud
Language setting: en
Operating system: Windows 10 - Business Edition
Version: 10.0.17763
Application architecture: x64
System architecture: x64
Logical processor count: 8
Processor speed: 2.8 GHz
Built-in memory: 32586.0 MB
Real memory available to Lightroom: 32586.0 MB
Real memory used by Lightroom: 1014.9 MB (3.1%)
Virtual memory used by Lightroom: 1207.6 MB
GDI objects count: 619
USER objects count: 1902
Process handles count: 1784
Memory cache size: 167.4MB
Internal Camera Raw version: 11.3 [ 197 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 262MB / 16293MB (1%)
Camera Raw real memory: 263MB / 32586MB (0%)
System DPI setting: 120 DPI
Desktop composition enabled: Yes
Displays: 1) 2560x1440
Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: No, Keyboard: No


Graphics Processor Info: 
DirectX: NVIDIA Quadro M1000M (25.21.14.2545)

4 Messages

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164 Points

a year ago

This reply was created from a merged topic originally titled Lightroom Classic: Lightweight export..

This reply was created from a merged topic originally titled Lightroom Classic: Lightweight export. I'm a sports photographer and can end an event with several thousands of photos. I'd like the ability to be exporting one batch while editing the next set in Lightroom Classic. However, the export step hogs up so many resources that I can't effectively edit any more photos until it is done. My computer is reasonably capable and has lots of RAM. It would be nice to have the export feature be something that could run with lower priority so I could still perform edits. 

Note: This conversation was created from a reply on: Lightroom CC: Additional options needed when exporting.

10 Messages

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296 Points

a year ago

Set your Lightroom process priority to Low (instead of Normal) and you'll have a working responsive machine again. I'm only on an i5-6600k and I can watch full-screen 1080p youtube while exporting (at the cost of prolonging my export of course...)

17 Messages

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382 Points

a year ago

I would also like an option to limit cpu usage by the export process, I am a working professional photographer and I don't care how long exports take. More important is the ability to use lightroom during an export, which is currently impossible. 

For those who have suggested changing the process priority, it does help a little but is far too cumbersome a procedure to do regularly. 

Please add this feature Adobe!

443 Messages

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6.6K Points

a year ago

If you go to Puget Systems website (pugetsystems.com) you will find that they have an article about turning off half the cpu threads for LR, and have produced a utility that launches LR with half the threads. It is not permanent; you just launch LR from this utility (put it on your desktop) when you want to do exports, and in most cases it slows down exports and leaves half your threads free for other purposes. Its not what they designed the utility for (as you will see when you read the article), but I realised it might just be what you posters want. I've tried it and it only allows LR to use half the threads, slowing down export a little, but the other threads are free for other programs.

Bob Frost

83 Messages

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1.6K Points

Robert,

Can you post the URL to that article.  Thanks.