This article includes two videos that aim to provide guidance for Qlik Sense Enterprise on Windows performance issues and RAM usage concerns.
Note that even though Qlik Sense is referenced in the video, both Qlik Sense and QlikView share the Qix engine. This means they share performance aspects and the investigation steps and considerations are the same in many scenarios, or at least very similar.
Common root causes of performance issues and high RAM usage are (but not limited to):
System architecture design
Dedicated servers vs. shared
Too many concurrent tasks
Live data reloads in task
Poorly designed app
Additional material is provided as Related Content.