In a brand new install, still being set up (Oracle Linux 8, Foreman 3.1, Katello 4.3 RC4) I happened to see these lines in the foreman/production.log. Anything to be concerned about?
2022-01-24T09:00:08 [W|app|] Setting remote_execution_workers_pool_size has no definition, please define it before using.
2022-01-24T09:00:09 [W|app|] Setting host_tasks_workers_pool_size has no definition, please define it before using