title: Scikit-learn machine learning models training using multiple CPUs
body: <p>I want to decrease training time of my models by using a high end EC2 instance. So I tried <code>c5.18xlarge</code> instance with 2 CPUs and run a few models with parameter <code>n_jobs=-1</code> but I noticed that only one CPU was utilized:</p>
  
  <p><a href="https://i.stack.imgur.com/yKqAx.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yKqAx.png" alt="enter image description here"></a></p>
  
  <p>Can I somehow make Scikit-learn to use all CPUs?</p>