Once it has been running and reporting issues, I recommend disabling the add-on until you have pushed out fixes or understood why the previous logged queries are occurring.
It is not recommended to leave this add-on enabled.
The initial start of a search is known to take a while, this appears to be a design issue where all content needs to be loaded and then verified.
- Works on a single query at a time, not all queries for a request.
- Only logs slow public queries.
- Under "Performance", Slow Query Threshold is in seconds