Hey Mathias!

Some of the configs are documented in tf here as well as an example. You can list multiple confs in the custom_config block.

I've raised the lack of documentation around this with the team and it is a known issue. We are actually hoping to deprecate many of these configs and just enforce the sensible default, hence why there is reticence to document it.

I believe the values you are trying to set these to is already the default, and will eventually be unconfigurable, so it may not be worth spending too many cycles on this. Have you confirmed that these values are not the defaults?