Portal Express, Version 6.0
Operating systems: i5/OS, Linux, Windows
Use of "average user" to improve recommendation confidence
The Preference Engine can use an "average user," whose ratings are the average of all users' ratings. The buildstats utility computes the average ratings. Configuring an average user improves the confidence level of recommendations for that user. To do so, set eng_instance_name.db.engine.tune.disable.avg_user to false.
However, remember that this feature can be costly in system resources. To disable it, set it to true. (The default setting is true.)