Consider the maximum server load

The practical maximum print jobs is 50 per RAS Server. Although it is technically possible to exceed this maximum, we encourage you to start another RAS Server instance on a different CPU, if your RAS Server consistently approaches 50 simultaneous print jobs. RAS 9 introduced advanced job sharing, so that report instances are only opened when absolutely necessary. If a user opens a report for viewing purposes while that report has already been opened by another user and remains unmodified, the report instance is shared between the users.
The effect is completely transparent to the end user, because if one of the users sharing the instance modifies the report, the print job adopts its own Print Job ID, leaving the other users unaffected. This caching allows one RAS server to support more users than would normally be possible. Note that reports with subreports are not cached.