Skip to main content
Adobe Photoshop Family

6 Messages

 • 

156 Points

Mon, Jan 14, 2019 5:24 PM

Lightroom Classic 8.1: Using too much memory and crashing on iMac with 64GB of RAM

Adobe Lightroom taking up over 80GB of memory then crashing.  I am working with iMac Mojave and 64GB of RAM. Lr is using massive amounts of memory just by having the program running, not even heavy editing or exporting.  What is the issue here? This is Lr classic 8.1 

Responses

Adobe Administrator

 • 

9.2K Messages

 • 

127.8K Points

2 years ago

Saskia,

Do you work with more than one catalog? If so, does the problem happen in all catalogs?


Adobe Photography Products

Quality Engineering - Customer Advocacy

6 Messages

 • 

156 Points

2 years ago

It is a brand new catalog with only 5,000 images in it.   I just updated to 8.1 and started this new catalog.  It never happened in the version I was using previously, Lightroom 2015, and I had 52,000+ images in that catalog. Thank you. 

Adobe Administrator

 • 

9.2K Messages

 • 

127.8K Points

2 years ago

If you create a new blank catalog for test purposes, import a couple of photos, and work with them does Lightroom consume the same memory?
Adobe Photography Products

Quality Engineering - Customer Advocacy

6 Messages

 • 

156 Points

2 years ago

I will try this once I finish the work I started in this catalog, thank you. For reference, how much memory should Lr be using if working properly. 

Adobe Administrator

 • 

9.2K Messages

 • 

127.8K Points

2 years ago

2-10 GB is not unusual but it depends on the system state, active programs, operations you are performing in Lightroom etc. If it gets much above 10 and stays there without eventually giving the memory back, then we have to look at things closer. 
Adobe Photography Products

Quality Engineering - Customer Advocacy

6 Messages

 • 

156 Points

2 years ago

Hi Rikk, Thanks for your continued help.  I started a new catalog and it is climbing up to 6gb of memory use while in library mode making selects. I do not run into this issue with Lr 2015 version.  What next steps should I take?

Adobe Administrator

 • 

9.2K Messages

 • 

127.8K Points

6 GB is not that much Ram usage.  If you'd said 26, I would have been concerned. In my experience Lightroom floats between 2 GB and 10 GB in regular use and that is normal. 

Performance changes in subsequent versions since the CC2015 days do consume more ram to make certain operations fun faster. 

What is your current system ram?
Adobe Photography Products

Quality Engineering - Customer Advocacy

6 Messages

 • 

156 Points

Thank you, I will keep an eye on it.  The reason of concern is that it doesn't use as much memory when I run Lr on my mac-book pro, so I wondered if there's something in my settings.  I currently have 64gb of RAM in this imac.

Adobe Administrator

 • 

9.2K Messages

 • 

127.8K Points

With 64 GB, I wouldn't be concerned unless your Lightroom instance in Activity Monitor gets up over 24 GB. 

With 16GB, I wouldn't start worrying until it gets up around 12-13 GB

Keep an eye on it for now. There isn't a setting to set.
Adobe Photography Products

Quality Engineering - Customer Advocacy

294 Messages

 • 

4.5K Points

2 years ago

Hah!  I have 128GB on my MacPro and Lightroom typically uses as much as 85GB while doing absolutely nothing.  I do have a 4M image catalog (which is about 28GB in size), but seriously, LR has a leak.

6 Messages

 • 

156 Points

Yes, it went over 86+GB in memory use just be being open overnight and crashed the entire (brand new) computer.  So, now I just have to quit Lr all the time. Do you use other programs or just put up with it since you have so much RAM?

294 Messages

 • 

4.5K Points

I do use other programs (e.g.  Photoshop. AutoCAD, Photo Mechanic, ON1, DXO, etc.), but when I bought the MacPro I went all out with OWC RAM as an upgrade as LR has had these memory issues since at least version 7.5.

I new test catalog with half a dozen images exhibits the same memory hogging.

Only Lightroom hogs RAM to any such degree, and only since 7.5.

Adobe Administrator

 • 

9.2K Messages

 • 

127.8K Points

2 years ago

We’ve seen instances where malformed catalogs can cause excessive memory usage at idle. (Especially on older, larger catalogs. This is normally confirmed by creating a new minimal catalog and seeing if memory climbs. If it doesn't you may have an aberration in your catalog. If you want to test this hypothesis please try the following.

  1. Select All Photos in Catalog Panel of Library Module
  2. [Ctrl/Cmd]+[A] to select all
  3. Right-click on any photo and select Stacking>Expand All Stacks
  4. [Ctrl/Cmd]+[A] to select all again
  5. File>Export as Catalog...
  • Save As: TestHighMemoryUsageCopy
  • Where: Desktop
  • Do not check  Export Negative Files or Build/Include Smart Previews
  • Check: Include available previews


Open the TestHighMemoryUsageCopy.LRCAT file in Lightroom and attempt the same operation(s) that caused the high memory usage.

Does the high-memory usage repeat with the test catalog?



Adobe Photography Products

Quality Engineering - Customer Advocacy

13 Messages

 • 

282 Points

Thanks for the hint.  Is there a solution to fixing the malformed ness of the old catalog?  I've been using the same catalog for a decade!

Adobe Administrator

 • 

9.2K Messages

 • 

127.8K Points

Restoration from your recent backup is your first method of this. If you malformed catalog is very old then you may have much additional restoration to perform. It is hard to say without knowing if and when your catalog had the problem. 
Adobe Photography Products

Quality Engineering - Customer Advocacy