Auto-complete configuration allows you to set the proportion of documents in the index where a term should appear to be suggested in the auto-complete. The higher this proportion, the less terms are going to be suggested.
In order to configure auto-complete, you have to be the search administrator, and access to the UI.
Now you can set the value to something between 0 and 1, then click the “confirm” button.
Core reload required
Keep in mind that Datafari takes account of the changes only after a reload of the core or a complete restart.