SQL Server + .net C＃应用程序的性能问题

I support an application that runs on SQL Server and was developed on .net c#. The application gets its information from the local system (ERP) and process it in a few batches during the day (most of the times, it'll be in just one batch). Then it presents it to the users in the form of charts and reports (the application is basically a reporting one; almost no data entry is made on it, but on the company’s local system). I support an application that runs on SQL Serve