Sizing AJax true client load test

Hi there,

I am attempting for the first time to load test one of the application using Ajax true client. We plan to load with 1000-concurrent users for few business process.

Has anyone tried high vuload testing using Ajax true client? Do you have any suggestions in terms of the hardware you used for Load generators?

I was informed that Ajax trueclient are memory & CPU intensive. I will be using high end hardware, so getting few 8GB memory RAM is not a big deal...But I wonder how the CPU utilization can be controller?

I did run for 25 vu load and peak CPU utilization was 19%, I am struck on how to right size my LG's for handling 1000 users.

Thanks for your time and appreciate your thoughts.