VERIFIED SOLUTION i
After upgrading to 3.X to 4.X, execution time of queries to EngageOne Server Repository increases. This could also slow the execution of EngageOne web services as they also query EngageOne Server repository in some scenarios.
This could be caused due to some table indices present in 4.X but are not used while query execution. These indices were used in 3.X.
ResolutionUPDATED: September 6, 2018
This has been fixed in EngageOne Server version 4.4.7 and later.