title: How many num_workers in DataLoader?
body: <p>I have a machine with 1500 Gb of ram and 112 cores but no GPU. I would like to know how to calculate suitable number of <code>num_workers</code> in DataLoader and batch size.</p>
  <p>I have to make the inference with Inception-v3(pytorch) on 80,000,000 images.
  I tried with a batch size of 30k and <code>num_workers = 4</code> with fine results. if I try with <code>num_workers = 50</code> I don't get a good result</p>