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# Thread: How many real users is a Vuser without think time?

1. ## How many real users is a Vuser without think time?

I'm doing a web load testing on our site and i'mtrying to find an equation of how many real (live) users does one Vuser replace?
Did anyone here ever researched this thing? i'd be glad to get some advices.
Thank You :-)

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2. ## Re: How many real users is a Vuser without think time?

that's a legit & overlooked question... Really "unanswerable" however to the degree that will yield any conclusions however as there are simply too many variables -pertaining to your (or other) site's architecture, internet latency, (day & time of day etc ) yada yada....

Real question to ask is "what's the likelihood" of a user entering your site as a function of no think time ( once in I assume )?,...
BTW, "rendezvous'" points ( load runner ) will simulate this...

You're no doubt aware that it's best to simulate "real world" experience as it applies to a virtual user... their actions, predictable behavior etc.

Another question is (& I assume you're original question is really this ): How many concurrent users can my site ( web, app database server) withstand.....?

Anyways, long winded answer suggesting that there's no "formula" for what you ask...

Anyone else? - Vic

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3. ## Re: How many real users is a Vuser without think time?

I agree with you Vic. To many things to consider and then you have to consider how much think time a real user actually averages between each action. If you do this and a real user waits 4 secons is it possible to say that a vuser that only waits 2 seconds will simulate two real users. I do not think you can say that. So I do not think it should be measured as 1 vuser to X real user. Instead it should be determined by load factor. 1 vuser can create the same load as X real users. This I think will help you more.

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Simple minds, Simple thoughts!

Doug

4. ## Re: How many real users is a Vuser without think time?

For stateless site you have to emulate just hits/sec.
For site maintaining states number of connected users can be a bottleneck.

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