For some reason Lightroom 2.4 is taking an enormous amount of time to render thumbnail previews and in spite of having my thumbnail cache set to 50 GB, it still re-renders the thumbnails every single time I use the scroll bar.
Every other aspect of Lightroom performs just fine on my machine. But the library is so slow that it is unusable. Every time I touch the scroll bar I can see a somewhat darker preview of the thumbnails and then as soon as I stop scrolling, the CPU shoots up to 100% utilization and I watch as the thumbnails brighten and adjust one by one. 30 to 45 seconds later I can click on the thumbnails and navigate around just fine. Performance is great in fact until I touch the scroll bar again.
The basic question is this. Why does Lightroom refuse to cache my thumbnails? And why does it take soooo long to render them when Vista's explorer can render hundreds of thumbnails off even a flash card in seconds? Even if thumbnail rendering was slow it would be fine if Lightroom would only cache them for me so it doesn't have to redo it every time I scroll back and forth. Shouldn't there be an option to render thumbnails on import as well as 1:1 previews?
I am running Vista 64 bit with 4GB of RAM with a Gforce 7600GT graphics card. My library has about 18,000 images in it. But I've also tried with a brand new small catalog. I'm shooting and processing Nikon D300 RAW files.
I've done all the standard performance tweaks that everyone talks about:
1. I render 1:1 previews and never expire them.
2. I have tried all the various nvidia card tweaks.
3. I've updated to the latest and greatest nvidia drivers.
4. I have my catalog on a separate drive from my images, and my thumbnail cache on yet a 3rd drive.
5. My machine has plenty of RAM, and in fact Lightroom is only using 1.5GB leaving me with well over 1GB remaining.
6. My machine is not swapping at all.
I've been reading and reading for the past 24 hours about this issue but have yet to come up with an answer to it. I did find this old thread from over a year ago that describes the EXACT same problem I am experiencing except his problem was with version 2.3: http://forums.adobe.com/message/1395391#1395391
Does anyone have ANY idea what can be causing this? As is, I can't use Lightroom under these conditions.