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1:1 Previews Question (LR 5.7)

Joined
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Puget Sound
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My normal work flow is such that I am not usually needing to process large numbers of images (excepting import) so my current 3+ year old hardware is able to meet most of my needs with not too much delay. Unfortunately, I am now needing to process a large number of images that I previously imported, and I am finding things to be slower than I would like, especially related to viewing large numbers of images at 1:1 in the Library while I those that I wish to process. I normally import DNG files (no raw embedded) with 1:1 previews created at the time of import. My catalog resides on my laptop's 7200rpm internal drive, and my images reside on a 7200rpm external USB 2.0 drive. I realize this is not an optimal configuration, but as LR is not used to produce income, my hardware gets updated when my budget allows (hopefully later this year). So, I am not asking for specific hardware recommendations at this time, but rather a refresher as to where my previews reside (I am assuming with my LR catalog on my internal drive), and more importantly, any suggestions as to how I can speed up that dreaded Loading message when I zoom in to images at 1:1 when culling. Or, is this just the limitations of my hardware (8GB RAM and second generation i5 processor) that is going to teach me about the virtues of patience?

Thanks,

--Ken
 
Joined
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Ken, yes the preview cache lives in the same folder as the catalog, i.e. on the internal drive.

If a 1:1 preview already exists, then I wouldn't have expected much of as loading delay (if any) when zooming to 1:1. Chances are, therefore, that the 1:1 previews that you initially created when you imported the images have fallen by the wayside....either because you have them set to be discarded after a set period of time - Catalog Settings>File Handling tab - or the images have been already edited, which discards the existing library preview and only a standard-sized preview is eventually created unless you specifically render 1:1 previews.

My suggestion would be to select 40 or 50 of these previously imported images, have Lightroom render 1:1 previews for them, then move through the images in Loupe view in the Library and check for the extent of the loading delays. If it's still there, for more than a second, then it's probably the system performance that's the issue, not the placement of the images on the USB2 drive.
 
Joined
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Hi Jim,

Tanks for the reply, and good catch. I thought that I had set the catalog to never automatically discard the 1:1 previews, but it was set for 30 days. Do you know if that 30 day clock gets reset when I examine an image at 1:1, or do I specifically have to render new 1:1 previews for all of the images?

Thanks,

--Ken
 
Joined
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Messages
12,538
Location
West Sussex, UK
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The clock should get reset, i.e. when you zoom into 1:1 on an image which doesn't have an existing 1:1 preview, then the "loading" delay is because a new 1:1 preview is being rendered....and that will be retained for the duration of the period specified in the catalog settings (or less if you edit the image).

Personally, because I have only small catalogs, I have "Never" set as the discard option for my 1:1 previews. I just wish there was an automatic way of having Lightroom render a new 1:1 preview as soon as I finish editing it, that would be the perfect time while the image is still cached.
 
Joined
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Messages
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Location
Puget Sound
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Thanks again, Jim. I decided to take your advice and select the images I was going to work on and have LR render some new 1:1 previews (while I was doing something else). Workflow was much smoother when I resumed post processing. I have been mulling a new Samsung SSD for my machine, and I suspect that it will breathe a bit more life (and hopefully some speed as well) into my machine. That would then allow me to upgrade one of my monitors that has developed a bit ghosting this past year.

Thanks,

--Ken
 
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