10044: Layer's data source is a linear referencing event table
Your layer's data source is a linear referencing event table, which can introduce performance issues.
Solutions
Do one of the following:
Review the draw metrics for this layer. If you are sharing the layer, review the data access metrics for the service.
Convert your linear referencing event table to a file geodatabase or enterprise geodatabase. See Migrate data for more information.
Additional information
Linear referencing is the method of storing geographic locations by using relative positions along a measured linear route feature. Drawing data sourced via linear referencing incurs the cost of looking up measures and matching them with values on the route. The dynamic nature of this lookup can be powerful if the data is updated frequently, but it may not perform well in other situations.
Consider the application in which you are using the linear referencing event table along with the drawing performance before continuing to use it. If possible, extract the data to a feature class and update as needed to provide the best performance.