LoadRunner cpu above 80%

Hi,

We are trying to run a script created by VuGen with 10 users on Load runner controller.

We see the CPU of the machine reach 100% taken by the 10 FireFox processes.

Is this expected that load runner can't run with 10 users on single machine (machine is vmWare).

Another question - How does the controller give snapshot if it not really open browser ? Can I get these snapshot also when run in storm runner ?

Thanks