A commonly used load testing model is to keep transaction rates constant regardless of how loaded the server system is already. In Silk Performer you can define workloads based on transaction or session rates, which Silk Performer tries to meet even when server response times increase due to the increasing load. Consequently, when server response time slows, Silk Performer automatically reduces think times or pacing wait times to keep session times constant.

Silk Performer offers two methods to keep transaction or session rates at a defined level.

  • Think time adaptation modifies the think times in your script so that a certain session time is reached. This option is only applicable if the virtual user script contains at least one ThinkTime() function call.
  • Pacing wait time is the period of time that a virtual user idles after a transaction or session has been completed, so that a certain transaction or session rate is reached.

To modify pacing options, click Run Test on the workflow bar and click the Pacing tab.

To open the Configure Pacing dialog, click ... in the Pacing column.

Several options are available to configure pacing:

To configure pacing wait time directly in a BDL script, use the BDL functions SetPacingTime() and GetPacingTime().

Silk Performer offers pacing for the following workload models:
  • Increasing
  • Steady State
  • All Day
  • Dynamic