You can configure different Java settings for the Silk Performer Workbench and for your remote agents. This means that you do not need to maintain identical settings and directories for your controller and agent machines. You can even specify to install only a JRE on agents without a JDK.
There is a corresponding profile settings tab at that pulls its initial values from the remote-agent settings at . It is the values on the active profile tab that are actually applied to remote-agents at test time.