This parameter specifies a threshold to use when looking at how many times the content of a given URL has been unchanged over the course of multiple crawls.
A particular revisit policy might decide that if the number of times a URL has been unchanged is higher than the threshold then a revisit would not be required.
Increasing this threshold would result in more revisits (HTTP HEAD and/or GET requests) being performed.
Set this configuration key in the search package or data source configuration.
Use the configuration key editor to add or edit the
crawler.revisit.num_times_unchanged_threshold key, and set the value. This can be set to any valid