OwnTone getting stuck when trying to open a large library with Apple Music

[aaronk6]

Platform:

• OwnTone 28.10 on Ubuntu 22.04 (4 CPU cores, 8 GB RAM)
• macOS 15.0 / Apple Music 1.5.0.174

Steps to reproduce:

• Have a large library (> 100k tracks).
• Open Apple Music on macOS.
• Select the OwnTone library in the sidebar.

It will take a while to load, but will eventually show the full library.

However, this is where it gets stuck:

• Most album artworks don’t load.
• Playback doesn’t work (sits at “Connecting…” forever).

At the same time on the server:

• The OwnTone processes max out all 4 CPU cores.
• The log output stopped.
• The Web interface isn’t reachable anymore.

Note that I added the following override to the OwnTone unit file:

[Service]
OOMScoreAdjust=-1000

Without this, the OwnTone process was killed when trying to open the OwnTone library in Apple Music:

owntone.service: A process of this unit has been killed by the OOM killer.

Is there anything I can tweak on my system? Or is this something that needs to be optimized in OwnTone?

Thanks!