Why Is the Query/Index History Empty?
No querying or indexing action has occurred during the time period specified. Try modifying the time period or selecting a different collection or source. Remember, histories are deleted after the number of days (see Modifying the Report Settings).
The recording of query or index history is disabled. Verify that they are not disabled (see Modifying the Report Settings).
Note: No message is displayed in the Query History or Index History page to indicate that it is disabled.