One of our webfarm sites was causing excessive CPU, running steady all day every day. We were able to determine that it's because of the Statsv2 logging. The load balancer isn't skipping stats, so it was building the statsv2 session table, and also querying that table over and over again.
My recommendation is that the load balancer skips stats logging since it's too verbose and doesn't really count for session traffic. That will keep the stats table size down and enable it to run quicker.
The two queries are: