Learn the difference between Entry Process and Number of Process for your hosting.
An Entry Process is the number of PHP scripts you can run at a time when access your website. If a user accesses a page of your website, that’s a single-entry process. This includes SSH and Cron Jobs as well. If this exceeds the maximum Entry Process, you will likely receive an Error 508 when a page is accessed. This process ends quickly that the only possibility you may have an error is when you have many users access the same page at the same time.
Number of Processes
This is the same as the Entry Processes, except that it includes processes generated by the account/website rather than the specific page, SSH or Cron Jobs. If the number of process has exceeded, this will show Error 500 or 503 when the website is accessed.