In the AUI version of SQL PI, wait categories with 0% (zero percent) and a gray circle cannot be clicked to go to a drilldown as in the previous older (WCF) version of SQL PI.
When the user can extends the zonar time range (for example from the default one hour to seven days) the workloads be
By Design
In the AUI version of SQL PI the wait event categories with a zero percent value will display with a gray circle and have been disabled by design to focus on the categories that have non-zero values.