QRadar: How to clean Global View IDs that have no references

Summary

Accumulator issues are caused by searches that are not properly tuned or too many global views in the system. By default, we allow a maximum of 300 Global Views in 7.3.x and later versions.
The reason No reference entries occur is because when a GV ID is missing the references list inside its VirtualView section, or when the VirtualView is corrupted during the mapping process. At times, when you are working with accumulator-related issues, you might need to clear GV IDs with No Reference entries, this helps QRadar function optimally.

IMPORTANT: Based on diagnostics, QRadar Support advises you when to clear GV IDs entries associated with No Reference in your environment. The steps are performed on the QRadar console. When these activities are done, services such as hostcontext and tomcat need to be stopped on the QRadar console. Due to service stoppage, the QRadar GUI might not be available, offense generation stops, report generation stops, and other services that are managed by hostcontext might stop. A maintenance window is advised to perform this activity.