I'm using Civi 5.35 and Drupal 7. We've installed the API CSV Import extension. At ~/civicrm/index.php?q=civicrm/csvimporter/import , I see a place to enter "Number Of Items To Process For Each Queue Item" followed by "This is the number of rows to process in each queue item. (Eg. 10)"
What is a "queue item"? Do I enter a 'Number of Items' value of, say, 2,000, if I want to 'process'/import 2,000 records at a time, but my entire import file can contain say 50,000 or 500,000 records, as long as it does not exceed 3 megabytes?