Ajax TruClient - Number of users per load generator

Hello Experts,

I'm working on Ajax TruClient protocol from last 1 year and the main challenge I have faced is number of users per load generator.

Now, we have requirement for more than 500 concurrent user load and the maximum user supported by load generator is 15 (what I have observed and yes it depends on LG configuration).

We are using below load generator machine.

1) Dual Core CPU (3.20GHz, 3.20 GHz).

2) Memory: - 8GB

3) Disk Space: - More than 50GB.

With such load, we need to add more than 30 LGs which is quite difficult.

Moreover, I have observed that if we increase hits concurrency then the maximum user supported by LG is 10 (with above configuration).

So, my question is what can be done to accumulate more number of users per load generator machine. Any setting in load generator, steps which need to be removed from scripts, use linux/AIX OS instead of windows?

Please suggest

Regards,

Deepak