How to calculate memory requirement for Vusers

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Filed under: how-to 

Memory requirement also called as Memory footprint for a Vuser can be called as a function that is dependant on Vuser type (Web, CITRIX, SAP GUI); application and system where youmemory requirements intend to run the test.

So if your Web/HTTP Vuser takes 5MB when running as a process, 50 Vusers would take 250 MB. Then remote desktop connection , third party program (that is continuously running in background) , memory consumed by application all summed will give you the memory requirement for a test.

You can calculate it empirically. Do it for say 10 Vusers and than extrapolate that requirement for x no of Vusers.

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Comments

6 Comments on How to calculate memory requirement for Vusers

  1. Rajiv on Mon, 20th Apr 2009 10:03 pm

    2. Hello,

    You have given an assumption that if a Web Vuser takes 5MB,My question here is:
    Is there any way to know how much amount of memory a single web HTTP Vuser actually captures??
    .Where can we see??

    Waiting for your response!!

    Thanks,
    Rajiv

  2. Ankur on Mon, 20th Apr 2009 11:10 pm

    3. @Rajiv: Run a scenario on your remote load generator machine.

    Set up a Windows monitor to measure the memory consumption. Ramp up the Vusers slowly and closely monitor the memory resources, you will get an idea.

  3. Rajiv on Tue, 21st Apr 2009 8:25 pm

    4. Thanks Ankur!!

  4. Ramkumar on Fri, 12th Jun 2009 4:06 pm

    5. Hi,

    Once vusers running as a thread,How much memory will allocate 1 vusers taken ?

    Please reply

    Cheers

    Ramkumar

  5. sudheer on Tue, 8th Dec 2009 4:34 pm

    6. ramkumar,

    It is based on the OS… and it will allocated from total RAM size…. it will vary from protocol to protocol.

    Refer HP Loadrunner Footprint document for more details. refer following link … u will get/(download file) more info…

    http://www.vietnamesetestingboard.org/zbxe/?mid=download&document_srl=140008&cpage=&listStyle=

    regards,
    sudheer

  6. suresh on Fri, 8th Jan 2010 9:28 pm

    7. how to identify bottlenecks in hits per sec and vusers and throughput graphs give ex and picutes and also give examples for web_custom_request,lr_eval_string,lr_save_string functions

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