Thank you,
I got the answer except few points;
The first one is about response times,
when you wrote
"measure response time for different loads (number of virtual users)"
what di you mean by response time ?
When I look at the log page, I only see Response Time in the request panel.
So Do I have to check for an exact request, and compare for every test ? For mhow many vuser ?
Or , you are talking about total resonse time ? if so, how will I get this value ?
Can you tell me in a more spesific way to measure this value and how to compare ?
The second point is that, "how many user can connect and use their system concurrently" question (unless all requests start to fail after some number of virtual users is reached)"
So at this point, two cirital words that is not clear for me; number of request failed, and the "fail" word.
In my test, not all but when I start to increase, few requests start to fail, so which percentage is dangerous
and, what is failing ? there is no connection "error", just warning for 500 internal error.
And for 500 status code error, we can not give our customer detailed answer when they want to learn real reason for the problem..
and you say that "delay time" is depend on web-site owner decision, and customer reaction
So, what it has to be happen to call it a fall ? For example, if 50 vusers come with 500 status code warning, of total 100 vuser, is this a fall ? is
