This depends on what You are building. If you are doing Daily strategies and want to keep the Cpu utilization at 100 % you need to tweek the Genetic evo settings. Right now I have 4 sessions doing 1.3 mio strategies per hour a piece but with standard setting cpu would drop to 6 % for very long periods of time and generation practically stopped.
sorry this was my problem, the task manager had a problem.
I restarted it and the utilisation is 80% now