I think background profiler should be disabled by default.

I don't :)

you can disable it in the configuration file on your servers though

I don't :)

you can disable it in the configuration file on your servers though

I don't think that's efficient

Would it be possible to add some documentation about the performance impact of the background profiler ? e.g. in https://spark.lucko.me/docs/Configuration

I think it would help with the underlying issue andreasdc is worried about