title: What is the difference between min_file_process_interval and dag_dir_list_interval in Apache Airflow 1.9.0?
body: <p>We are using Airflow v 1.9.0. We have 100+ dags and the instance is really slow. The scheduler is only launching some tasks.</p>
  
  <p>In order to reduce the amount of CPU usage, we want to tweak some configuration parameters, namely: <code>min_file_process_interval</code> and <code>dag_dir_list_interval</code>. The <a href="https://github.com/apache/incubator-airflow/blob/v1-9-stable/airflow/config_templates/default_airflow.cfg#L322" rel="noreferrer">documentation</a> is not really clear about the difference between the two</p>