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From Shmuel Krakower <shmul...@gmail.com>
Subject Re: How JMeter vUsers work
Date Sun, 15 Jul 2012 13:50:20 GMT
Pool Size = number of sub threads to use.

Shmuel.

On Sun, Jul 15, 2012 at 2:29 PM, Sergio Boso <sergio@bosoconsulting.it>wrote:

> Il 09/07/2012 11:24, Adrian Speteanu ha scritto:
> HI,
>
> just  to be sure:
> if I select
>   "Retrieve all embedded resources"
> and
>   "Use concurrent pool"
>
> the concurrent pool size IS the number of socket use to retrieve the
> object.
> Am I correct?
>
> Thank you in advance
>
>> Hi,
>>
>> Please note that the concept of virtual users is very tricky in JMeter.
>> Especialy for people that worked with other types of performance tools
>> previously.
>>
>> JMeter has threads of execution and their behaviour differs accordingly to
>> whatever you want your script to do (but they are java threads and behave
>> just like in any other java application). How sockets are opened differs a
>> lot too (your question is very general and I think it depends more on the
>> JVM and hte OS rather then jmeter itself). From monitoring the OS, on very
>> busy tests (where threads make 5-10 requests per second), each thread uses
>> 1 socket. But, depending on your OS and other configurations, sockets may
>> be left opened for a while after one thread ended a loop. So by having
>> many
>> threads or many loops per thread you might run into trouble.
>>
>> If you are having exceptions on the machine where you run jmeter (related
>> to network, number of sockets), then you'll probably need to tweak the OS
>> in order to make high loads with jmeter. Search in older threads, this was
>> previously disscused.
>>
>> Adrian
>>
>> On Thu, Jul 5, 2012 at 1:44 PM, Prabhash Rajarathne <rprabhash@gmail.com
>> >wrote:
>>
>>  Hi All,
>>> I want to know how does JMeter Virtual Users created. When simulating 40
>>> users does JMeter open up 40 sockets and create the load or does all http
>>> request / responses go back and forth from a single socket or port with
>>> multiple treads(sessions)? please explain
>>>
>>> Regards,
>>> Prabhash
>>>
>>>
>
> --
>
> Ing. Sergio Boso
>
>
> <mailto:sergioboso@yahoo.it>
>
>
>
>
>
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