Where does Meteor log internal things to?

I’m trying to debug some Meteor behaviour on the server, specifically as I tune some of the queries, as per:

I can look at the queries as they come into mongo, but I’m wondering where Meteor keeps logs of what it is up to, when it revalidates data etc.

I’ve read a bunch of stuff but can only find references to how one users Logger for one’s own logging, not where one controls Meteors’ internal logging.

All pointers welcome…