The statement is correct. In the Splunk Search & Reporting interface, the "Interesting Fields" list in the fields sidebar is populated based on a specific criterion. By default, Splunk identifies fields (other than the default selected fields like host, source, and sourcetype) as "interesting" if they appear in at least 20% of the events returned by the search. This helps users quickly identify fields that are prevalent in their search results and may be useful for further investigation.

The statement is not False. This 20% threshold is the specific, documented default behavior for how Splunk populates the "Interesting Fields" section of the fields sidebar. While Splunk's overall field extraction and management is complex, the definition for this particular UI element is explicitly defined with this percentage.

1. Splunk Enterprise Documentation. Search Manual

Version 9.2. "Use the fields sidebar".

Reference Section: The fields sidebar lists.

Content: The documentation states

"Interesting Fields

which are fields that have values in at least 20% of the events. The Interesting Fields list excludes fields that are listed as Selected Fields." This directly confirms the 20% threshold.

2. Splunk Education. Splunk Fundamentals 1 Courseware.

Reference Section: Module 5: Using Fields.

Content: The official course material explains the components of the search results page

including the fields sidebar. It defines "Interesting Fields" as those appearing in a significant percentage of events

with the default threshold being 20%

to distinguish them from fields that appear more sporadically.