i have a question about VUs limitation. i have a web application to test with 2000 VUs. i will do it as distributedly so i have few laptop.
laptop's general HW properties:
intel pentium 4 2000 mhz CPU
2 GB RAM
150 GB HDD
and other standart options.
my question is that: to do a clear test, approximately how many VU do i setup on each machine?
i think that, setting up all VUs just on one machine will not be healthy?
so what is this limitation?
It depends on how much work your scripts do (correlation, error checking, etc) and how fast the scripts run (average think time).
With that said, I'd try 500 VUs per laptop. Try one laptop first with 500 users, and monitor the CPU on the laptop. Try to stay below 50% CPU busy (average over 5 minute interval) on the OpenSTA servers so that they don't impact the test results.