Lightroom Catalog is Huge

I have 129,980 in my lightroom catalog.  The photos go back to January 2000 and are only about 350GB but this previews file is over 116GB.   This seems excessive.
Is the alternative to simply take a moment to build previews when I go to a folder?  Most of my folders are pretty small.

PictureTakerGuy wrote:
My concern is both wasted space and disk overhead.  120GB seems like a high percentage of overhead for a 350GB collection.  Especially when I consider I might never edit many of the photos there.
If you've got a number in mind that's too much, then there's a problem.
Many people don't worry until there's a performance issue, in which case it doesn't sound like there's a problem.
I'm coming from ACDSee world where there was little overhead and blazing fast photo thumbnails created when you went into a directory.
How would I do same in LR. I like LR and I'm not trying to bash it. I just don't feel comfortable with the amount of wasted space where I need to back it up, etc.
You need to understand that these are two very different programs which operate under very different principles. If you want the fastest performance out of Lightroom, then I think you want to have the largest possible previews, and they are left on your hard disk forever and beyond.
When I run WinDirStat it takes forever to even figure out how many files are in that catalog. It takes less time to get the pictures counted than the catalog or preview files.
Time it takes WinDirStat to finish? Hmmm ... I have never seen anyone complain about that before. Seems like you are inventing a problem. Lightroom is designed to produce a lot of preview files.

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