Raw cache building is just an adjunct to the thumb builder so if you just want to suspend the raw cache building, I think you want to click on "Thumb Builder" on the top menu and then "Stop".  It'll take a few seconds (up to a minute on large raws) to stop because it has to finish the (1-4) raws that are currently in the builder.  But it will stop.  Maybe I'll change that menu item to "Thumbs/Cache" to prompt people to look there.

Mike

Mel,
There is no such thing as 'regular raw cache'... You either invoke cache files or it skips making raw cache.
Here's the deal.
If you turn off the raw cache, then you essentially get thumbs, and when you want to place an image into the editor for example, without a cache file, you will wait for the raw to load ...
That can be excruciatingly long if you have a newer camera with a gazillion megapixels.
So what is raw cache.?
It is a virtually loss-less copy file that Ultimate builds so you can work efficiently and quickly with huge files.
There is another stage of raw cache which get used temporarily even while the raw cache is building; again to make you more efficient.
They get used when the dot on the thumbnail is green for go.
You can start working even though the real, full, cache files are not complete.
Those delete themselves as soon as the green dot disappears.

Hope that helps a bit.

Fred

No cache files are being built... Never mind what that counter is doing... nothing is happening.

Try this:
Open Utilities.
Select Explore Qimage application data.
Open RAWCachefolder
Delete a cache jpg...
Leave the folder open and when you go back to the thumbs, right click after you selected that thumb, and ask it to rebuild the cache for that thumb.
All those cache files were built by Lighning Raw cache.

Uncheck that in options and they will be deleted and NOT rebuilt when you return to that folder.

Fred

Fred and Terry - Thanks to both of you. 

Fred - got it - I see what is going on just by poking around in the cache folder. And you are correct - that cache counter that starts after the thumbs are built is what had me fooled - not sure what it is doing or why in the situation where raw cache option is turned off, but I see that it starts it over again whenever I open a folder that does not have raw cache.

And Terry - If I had just carefully read that screen and acted accordingly, and checked NO, then this whole thread would have been unnecessary, as that is all I wanted to do - leave the existing cache in place, but not build any for the folder I was about to open which contains about 100 - mostly useless - raw images.  I am so used to software assuming that I am an idiot (which would not have been far off in this case ) and asking me if I REALLY want to do what I just said, that I just mindlessly clicked Yes.

Thanks again - as it turns out it worked out well.  2175 images in raw cache.  I only need about 150 of them for now - the rest needed to go anyway - I need to remember to clean up more often.

Mel W.