Lightroom: Would delete the smartpreviews and reduce the folder size

  • 3
  • Question
  • Updated 1 year ago
  • Answered
  • (Edited)
The folder where are the 1:1 Previews are located would be bigger and bigger.
After 30 days the previews are not deleted by lightroom.

When i start manuel to delete the previews in Lightroom nothing will happen in the folder size.


I use the latest Lightroom CC version on Windows 10 Desktop.
Photo of Michael Geyer

Michael Geyer

  • 5 Posts
  • 2 Reply Likes

Posted 2 years ago

  • 3
Photo of Stefan Redel

Stefan Redel

  • 87 Posts
  • 29 Reply Likes
Jepp. Me too. Same here. Win 10, latest updates. LR CC 2015.7. i7-6900K. Separate catalogue for each single project.
Photo of Michael Geyer

Michael Geyer

  • 5 Posts
  • 2 Reply Likes
nobody knows a resolution????
Photo of Ganesh

Ganesh, Lightroom Engineer

  • 35 Posts
  • 18 Reply Likes
Michael, 
Smart previews and 1:1 preview both are different. Which one you are trying to delete?
Photo of Michael Geyer

Michael Geyer

  • 5 Posts
  • 2 Reply Likes
The 1:1 previews....
Photo of Ganesh

Ganesh, Lightroom Engineer

  • 35 Posts
  • 18 Reply Likes
I tried to delete the 1:1 preview folder manually and the folder size reduces. I tried on Windows 10 machine with latest lightroom version. 

Just to confirm are you removing the folder named <your_catalog_name>Previews.lrdata ?

your_catalog_name is name of your catalog. This folder is inside your catalog folder. 

We will be investigating the actual issue why "1:1 previews not discarded in 30 days" and confirm its buggy behavior. 

Also here is some information that might be useful for you:
"Even after discarding the 1:1 previews are 30 days, Lightroom has to re-create 1:1 previews the next time you need them—even if you’re just zooming in to Loupe view." 


-Ganesh
(Edited)
Photo of Michael Geyer

Michael Geyer

  • 5 Posts
  • 2 Reply Likes
Yes i can deleted the folder manually in explorer and now i do it because i will clean my harddrive space... i had only 280GB of previews....

I cant delete it in lightroom directly or after 30 Days...nothing happen.
Photo of Robert Frost

Robert Frost

  • 392 Posts
  • 51 Reply Likes

Not sure if this is the reason but 1:1 previews will not be deleted unless your chosen standard-sized preview is less than half the size of the full-sized preview.

http://www.lightroomfanatic.com/tutorials/behind-the-scenes/deleting-11-previews-lightroom-doesnt-reduce-preview-file-size/


Bob Frost


Photo of Robert Frost

Robert Frost

  • 392 Posts
  • 51 Reply Likes

(cont)


So check on the size your have chosen for your standard-sized previews, and the size of your images (=1:1 previews). You may be able to solve the problem by reducing the size of your standard previews in Prefs.

Any help?


Bob F.

Photo of Michael Geyer

Michael Geyer

  • 5 Posts
  • 2 Reply Likes
Hi Bob... i try it with 1024pix and it will not work :(
Photo of Ganesh

Ganesh, Lightroom Engineer

  • 35 Posts
  • 18 Reply Likes
Hi,

Yesterday one of my teammate verified the discard after 30 days options by changing system date and the size of the folder reduced. 

If you have some free time, we can setup a call to see the problem.

Thanks,
Ganesh
Photo of Yuri

Yuri

  • 1 Post
  • 0 Reply Likes
I had to delete the entire database of previews to get Lightroom to work again. Then it took my quad-core machine four days to rebuild the previews for the folders I actually wanted to keep in the first place.

Here is transcript excerpt with Adobe Support to "troubleshoot" the issue of database folder ballooning out of control:

Me: Back to lightroom... is there a way to shrink the size of existing catalog?
Adobe Support: You can optimize the catalog
Me: I did that. First I deleted 1:1 and smart previews. Then I restarted Lr with option checked to backup and optimize catalog.
Me: Size on my hard drive remained the same.
Me: Also for a test I tried to build 1:1 previews on one folder and 800 photos (each 50Mb took 30 seconds.
Me: Impossible so fast unless the 1:1 previews were never deleted, which explains why catalog folder never shrunk.
Adobe Support: Also you can trash the preview.lrdata file, and next time when you will launch Lightroom it will create new previews
Me: I thought of that. But.. Will it trash 1:1 for folders I would like to keep 1:1 prevs?
Adobe Support: No it will trash the complete preview for the entire catalog
Me: So basically there is no way to delete 1:1 for select folders and have the catalog system folder shrink?
Me: Just to confirm the development data is in NO WAY stored in the Lightroom Catalog Previews.lrdata OR Lightroom Catalog Smart Previews.lrdata folders?
Adobe Support: No unfortunately not
Me: Is there a way to check with Dev team? Alternatively, suggest to make that a feature to remove select previews on hdd?
Adobe Support: For that you can fill a feature request form [link to this forum]
(Edited)
Photo of Ganesh

Ganesh, Lightroom Engineer

  • 35 Posts
  • 18 Reply Likes
@Yuri

Your 'lrcat' will contain all the develop settings/edits done to the photos. Removing this you will loose your edits to the photos. 

If you remove the 'lrdata' files, you will loose previews only. (*Previews.lrdata, *Smart Previews.lrdata).