We are experiencing a slow start up time on the first report request of the day, or when there have been no report requests for an unknown period of time. In SQL Reporting
SQL Server 2008
does not use IIS, which is why the RecycleTime parameter moved to the RS config file. This also means that you can install the report server on your database server for better performance, without also having to install IIS.
The default RecycleTime of 720 (12 hours) should be reasonable for a report server that is only active during regular business hours. Nevertheless I have the same issue, even though I schedule a report subscription to run at 7:30 AM every weekday to cause the report server to initialize for the day.
I am wondering now if the RecycleTime parameter really is specified in minutes or if this might be a documentation error. I am going to try a larger value.