Comments on: Difference between concurrent and simultaneous vuser

By: Manish

Manish — Tue, 15 Sep 2009 13:02:09 +0000

The explanation you have give in vice versa. For ex: in load runner script, we have two function i.e. web_concurrent_start(NULL) and web_concurrent_end(NULL). These functions perform concurrency. Its like a rendezvous point when all the URLs get loaded concurrently while in rendezvous point all vusers loaded concurrently.

By: lina

lina — Mon, 03 Aug 2009 08:50:53 +0000

thank you that was so clear , however i have another problem in understanding concurent users , if i have a script with 100 vuser on yahoo 1) Login, 2) Check no of unread mails 3) Logout
and they iterate for taks no 2) twice and in the controller i edit to 500 Vuser to run conncurrently ? please confirm if the below is true :
1- 500 concurrent user will run
2- each with 100 vuser and it will iterate for task no 2) ( all will run as vuser squence at the script)
my question is:
If i use Pramaterization for vuser random/once/…etc the possibilty of use to run with multisessions that may cause conflict at DB side (if Vusers are submitting order for example)
how can i prevent that??

thanks

By: Ankur

Ankur — Tue, 03 Feb 2009 10:41:15 +0000

That's why I made it as a seperate post. There is a lot of confusion regarding these terms. You may want to check the ongoing discussion at the HP LoadRunner forums.

By: Jacintha

Jacintha — Fri, 16 Jan 2009 12:33:31 +0000

can you please revisit your statement. I guess the explanation given here is vice versa.Because normally the Simulataneous Users are always greater than concurrent users. when we take a banking application, simultaneous users would be 50000 users whereas concurrent users would be 5000 only.
Please correct me if i am wrong.