Device calibration is performed to calculate the optimal VUD value for the Number of Virtual Users per Load Injector Server. The device tasks complexity and required CPU resources are considered during calibration. Calibrated VUD value ensures LI Server CPU load no more than optimal 60-80% and provides the maximum load distribution among the LI Servers. 

Calibrated VUD varies based on a task type:

  • HTTP(S) Test: from 8 to 500 users
  • Web Page/Web Application Test: from 2 to 8 users
  • Web Application with RIA image validation: from 2 to 5 users