Library Limitations for Artist / Album radio

Greetings. This is a topic I have tried to research all over but haven’t really found anything and more of an inquiry rather than a bug report. I frequently use the sub-option for “radio” when using the Artist mix feature in my Plex Amp clients both Mobile (Samsung Galaxy Fold) and Windows. As my library has grown, this has become both more fantastic and unreliable. I suspect it is due to the library’s size at this point. It offers a very true radio experience based on artists I have selected but that must cost huge resources to build a station. When I first started using this, I had a library of roughly 200k songs and was able to use 10 artists or more as “seeds” for a radio station that would last me weeks. At this point, the library is nearly 700k songs and I am lucky if I can initiate a radio on more than 2 or 3 artists. It’s still vastly superior to the way Spotify or Pandora creates music stations but I am wondering if there is any documentation that shows the limits of what Plex can handle under strain of large libraries, or even ways to make it possible to deal with these large libraries.

All features are enabled such as sonic analysis and such. The library itself is stored on a Synology NAS that is a little dated, but the Plex database and all running data is stored in an m.2 and is running on the official container for Unraid. None of my other libraries have any struggle to them, and I do have quite a bit of anime, cartoons and TV also on my server. However, I suspect, playing of items in a linear fashion probably does not stress the database at all.
So all that to say, anyone have any suggestions on what I might do? or has anyone discovered any hard limitations where plex simply can’t handle it? Is it worth splitting out my plex server into multiple instances, and running the music on its own dedicated instance to reduce impact on the database, of course it requires thought on how I’d run two containers from one box… Also, the database at this point is nearly 6.5 gigs if that is any indication on library size. Metadata folder is over 1TB, which includes a few thousand TV shows and movies.

It’s likely timing out because the server is taking a long time, but posting Plexamp logs after attempting would show.

never tried grabbing logs out of plexamp before.
Where are those located? and do I need to trigger a log type like debug or something before I make an attempt?

Click the Plexamp logs link.

Plexamp.Logs.zip (1.2 MB)

Attached logs.
Last things I did was attempt to play a radio that fails 2 times.
Prior to that I was able to play a radio that succeeded with fewer artists. Not that the artist’s should matter I would think but…

Bastille, Imagine Dragons, Starset, Sleep Token - Works
Bastille, Imagine Dragons, Starset, Sleep Token, PVRS, Twenty-One Pilots - Fails

Your suspicion is likely correct, and I assume that would be attributed to the size of the library causing plex to freak out. I guess my wonder becomes then, is there a way around it? Can that wait time to error be changed?

Plex Media Server Logs_2024-07-05_17-16-16.zip (5.7 MB)

I figured you might want the plex server logs too so I downloaded them as well.

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