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 <[email protected]>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
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