LR Slow to Load thumbnails

Question

Hello,

I have used LR for over 10 years. I've experienced this problem before, but it is incredibly slow (3-4 seconds to show a thumbnail) and I'm wondering how to fix this problem. I have a new MacBookPro with 16GBram. The thumbnails will not load until I click on the image and then it takes 3-4 seconds to load the thumbnail. I have tried this with my photos networked to a Synology NAS. I also tried with the catalog and images on a USB-C Sandisk Extreme 2TB SSD. I've also tried with the catalog and images loaded directly on my laptop. I have cut the gallery down to 471 images ... still insanely slow response. I have restarted my machine and made sure there is at least 20% of space free on the laptop SSD. When I click on an image to load the thumbnail, the MBP CPU jumps to 100% or greater. Anyone know what is happening?

jbinco · Answer

What type of image files are you viewing?  Some Fuji and Olympus cameras use very small embedded previews in their raw files.  Lightroom may be generating new minimal sized previews because the embedded ones are smaller than your minimum "standard" size as set in your catalog file handling.  You can go to preferences - general and allow your machine to replace embedded with standard previews while idle.  That may help when you later browse library images for the first time.  Also increasing the raw cache size will give you a larger back stock of the previews you do generate for later use.

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