CPU

[thbkk]

Is the current docker instance in a VM?  Or Docker on the host OS?

Order of preference.

1) Direct install on bare metal OS
2) Docker install on bare metal OS
3) Direct install in LXC

And a distant last

4) Docker install in VM

With the limited performance of the RPi4 you really need to minimize overhead that virtualization causes.  Docker and LXCs minimize a lot of that since they use the host kernel while VMs use their own kernel with virtualized hardware, introducing a lot of overhead.

Thanks, but due to the low performance, I bought a mini server (Lenovo ThinkCentre M720q Tiny - Intel i5 8400t). My plan is to use a VM with Docker containers for the ARR stack, hoping that this will solve the issues. A friend has the same mini server but experienced occasional freezing when using fast forward. He switched to Plex and hasn’t had any issues since. Any ideas?