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CPU Usage on 100% During Export

New Here ,
Mar 31, 2019

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When exporting my RAW images to JPEGs to send to clients Lightroom uses up all of the available CPU power which makes the mouse stutter and makes it very hard to do any other task whilst the export is occuring.

This is not a new problem. It has been happening for quite a while now since version 6 or 7, I can't remember exactly but I do know this wasn't a problem with older versions of Lightroom before the Adobe Subscription service.

I've tried enabling/disabling GPU utilization and that made no difference.

I own an Intel i7 3.4GHz CPU so lack of power isn't the problem.

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CPU Usage on 100% During Export

New Here ,
Mar 31, 2019

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When exporting my RAW images to JPEGs to send to clients Lightroom uses up all of the available CPU power which makes the mouse stutter and makes it very hard to do any other task whilst the export is occuring.

This is not a new problem. It has been happening for quite a while now since version 6 or 7, I can't remember exactly but I do know this wasn't a problem with older versions of Lightroom before the Adobe Subscription service.

I've tried enabling/disabling GPU utilization and that made no difference.

I own an Intel i7 3.4GHz CPU so lack of power isn't the problem.

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Mar 31, 2019 0
Adobe Community Professional ,
Mar 31, 2019

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Make sure Sync, Address Lookup, and Face Detection are all paused as shown below.

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Mar 31, 2019 0
LEGEND ,
Mar 31, 2019

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AzzBlock  wrote

When exporting my RAW images to JPEGs to send to clients Lightroom uses up all of the available CPU power which makes the mouse stutter and makes it very hard to do any other task whilst the export is occuring.

This is not a new problem. It has been happening for quite a while now since version 6 or 7, I can't remember exactly but I do know this wasn't a problem with older versions of Lightroom before the Adobe Subscription service.

I've tried enabling/disabling GPU utilization and that made no difference.

I think this is expected behavior by Lightroom. Exporting is a very CPU intensive task, and it will use up most of the CPU power. They did change the behavior a few versions ago (I don't remember when) to make more use of the CPU, causing some CPUs to hit 100% on long exports.

I own an Intel i7 3.4GHz CPU so lack of power isn't the problem.


You can say this all you want, but the evidence is clear: your CPU is at its capacity on this task.

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Mar 31, 2019 0
Most Valuable Participant ,
Mar 31, 2019

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To build on dj_paige's reply, Adobe Official Rep Rikk Flohr said a couple months 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.

In years past, people complained that LR exports took too long and weren't using all of their CPU's processors. So Adobe changed LR to use all your CPU (no matter how fast or slow it is) to get the export done as fast as possible.

A number of people have complained about this. I suggest you post a feature request on the official Adobe feedback forum, where Adobe wants all product feedback: Lightroom Classic CC | Photoshop Family Customer Community . Adobe product developers read everything posted there but rarely participate in this forum.

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Mar 31, 2019 0
New Here ,
Apr 01, 2019

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Thanks. I actually searched for Adobe technical support which lead to this community forum meaning they obviously don't have any. I will try the feature request as you suggest.

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Apr 01, 2019 0
New Here ,
Apr 01, 2019

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This behaviour in my opinion needs to change even if it results in a slightly slower export or at least have the option to limit CPU usage.

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Apr 01, 2019 0
Adobe Community Professional ,
Apr 01, 2019

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If you are willing to let the export process take longer, you can use your OS tools (Windows Task Manager or the Mac equivalent) to lower the process priority of LR before you start the export. This will smooth out the system throughput.

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Apr 01, 2019 1
New Here ,
Apr 01, 2019

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Thanks but I tried that and it makes no difference.

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Apr 01, 2019 0
Adobe Community Professional ,
Apr 01, 2019

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Can you describe "makes no difference"?

During the export processing, LR is going to pretty much max out your CPU. The question is how well it plays with the other processes.

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Apr 01, 2019 0
New Here ,
Jun 20, 2020

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No fix? I do have a i9 9750h and experiencing this myself. CPU stays at 100% usage the whole export time(95 Degrees Celsius) and cursor it's choppy. Audio on spotify also. Pls help

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Jun 20, 2020 0
LEGEND ,
Jun 20, 2020

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As stated above, this is the expected behavior of Lightroom exports, and from that point of view, since this is expected, there is nothing to fix. Since you have a very fast CPU, it will get through the exporting process faster than people who don't have such a fast CPU. Any change to make the CPU not use 100% would slow down the export time, but it would probably also improve the Spotify problem. Take your choice, and provide feedback to Adobe as instructed above.

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Jun 20, 2020 0
Adobe Community Professional ,
Jun 20, 2020

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One way to get LR to play better with the other tasks is to use the OS tools to lower the priority of the program to "below normal" or the like before starting the export. This will allow LR to use up all the available CPU cycles while giving priority to the other programs and the OS.

 

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Jun 20, 2020 0
Most Valuable Participant ,
Jun 21, 2020

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Many have complained that LR is unusable during exports, and sometimes their entire computer is unusable:

https://feedback.photoshop.com/photoshop_family/topics/classic-cc-uses-90-cpu-during-export

 

Please add your constructive opinion and details of your issue to the bug report, and be sure to click Me Too and Follow in the upper-right corner. That will make it a little more likely that Adobe will prioritize a fix, and you'll be notified when the bug's status changes. (Simply linking back here will generally be ignored by Adobe.)

 

There have been a few statements by Adobe employees over the past several years that, after Export was changed in LR 6 / CC 2015 to use multiple cores more effectively, they intended that Export would consume most but not all of the available CPU, which would allow for interactive use.  I found one of those statements here:
https://feedback.photoshop.com/photoshop_family/topics/lr-cc-2015-2-and-up-cpu-usage-on-export-on-25...

 

See this post for a workaround that restricts LR to using a subset of the virtual/logical processors:

https://feedback.photoshop.com/photoshop_family/topics/classic-cc-uses-90-cpu-during-export?topic-re... 

 

E.g. if you have 16 processors, restricting LR to use 12 is a good compromise, leaving 4 for interactive use, while still letting export and merges use most of the computer.

 

[Use the blue reply button under the first post to ensure replies sort properly.]

 

 

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Jun 21, 2020 0