100GB usage in ./Application Support/Plex Media Server/Media/localhost

I noticed my primary drive (ssd) is almost full which is odd since the home server doesn’t have much installed on the ssd. Media is kept off on hdds.

Anyways, a quick analysis shows that /var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Media/localhost is at 100GB usage.

What in the world is this localhost folder for? It has large .bundle files that are over two years old in various subdirectories.

Is this something that an be deleted to clear our space?

How do I prevent it from getting so large in the future?

I would expect /var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Metadata to be high for cached information/thumbs but it is simply 12GB.

100GB is not unheard of with a large collection or a lot of photos.

https://support.plex.tv/articles/202529153-why-is-my-plex-media-server-directory-so-large/

Sure, so I changed 4 libraries to no thumbnail creation. Additionally, I added GenerateBIFFrameInterval=20 to preferences. The scheduler is disabled for thumbnail generation. I don’t see a change in disk usage. How would I go about it cleaning up the now defunct thumbnails and potentially cleaning out the ones that are still enabled but are less than 20sec apart?

There’s an option to “Delete Preview Thumbnails” in the advanced section when you edit the your libraries.

Sure, I expected the first part of my question to be automatic so that button worked on the libraries I disabled.

However, I assume deleting thumbnails would be a bad idea for the one library I am leaving it enabled on. I made the Preferences.xml change from 2 seconds to 20 seconds. Shouldn’t there be a way to apply this change and not require a lot of CPU time to rebuild all of the thumbnails again?

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