Start on a sample queries doc.

Yes, I think that's the intent of the query. Find the max value for each  host in the interval, then select the top 13 hosts.

However, one thing this query doesn't get you is the timestamp for the max measurement of each host. This is because `max` enforces an aggregate window. In this query where a group by time isn't specified, the resulting time would be 0 on those points, which kind of sucks.

Worth thinking a bit more about, I think