Capacity = the number of agents (m) = the number of parallel process
The number of users logged into the system is not the concurrency one who are the actual users processing /querying. While there is an exception to every rule, you will rarely see concurrency go above 20% of the numbers of users unless a specific period of time such for a specific processes such as a financial close period.
Capacity Planning and Performance Analysis
Capacity planning is closed linked to Performance analysis. The difference is that:
- performance analysis involves tuning the current system so that it can perform better, thereby enabling it to support more users.
- Capacity planning, on the other hand, focuses on how many users a site can support and how to scale the site so it can support more users.