I think the answer is “look at the log files” - sorry, useless to me or direct performance observation ..mine is performing well with no lag at 33000 tracks. Is that it or is there some other direct measure?
An i3 NUC is good for 100,000 tracks, multiple zones, and modest DSP.
If you’ve chosen the correct NUC for your library and use, then it doesn’t matter.
However, if you’re keen to see performamce data, then Roon OS isn’t the way to go. Use a general purpose Linux distro instead.
Simple answer is you can’t.
No access to the OS
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