It is not uncommon for applications to be written in such a way as to cause frequent or even constant indexing, and as the load of users and data increases, the indexing work gets harder and harder.

Response time is one measurement that gets a lot of attention, and tuning your portal to provide a consistent response time range with the expected volume of user load is your ultimate goal.

The alternative is to load a single server with several applications so that the organization gets the full total cost of ownership (TCO).