By default, reports and dashboards in IT Analytics (hosted by SQL Server Reporting Services) will run automatically when selected. This behavior can sometimes be problematic for environments with excessive amounts of data, resulting in increased load times or timeouts for certain reports. One option to prevent this is to modify the value of a parameter within a report so that it does not execute automatically when clicked, a process which is documented in the article below.
To modify report parameters in more detail in order to load reports more efficiently, please see the article: Modifying IT Analytics Reports to Decrease Load Times.