Hi Milamber,
I wish the Wiki content can be preserved, because the official JMeter
documentation is quite dense already. This is more of a how-to or
tips-and-tricks, perfect for Wiki and FAQ. Here is my prepared text (remove the
1st paragraph if not appropriate):
-------------------
JMeter Ramp-Up Rate
I can't count how many times I've explained to junior developers how to adjust
the "Ramp-up Period (seconds)" when he/she increases the "Number of Threads
(users)" setting of a thread group. Forgetting to do that floods the target
site and the test machine itself.
Here is how to use the concept of "Ramp-up Rate", which will save time in
between tests and have a more consistent and reliable test plan. For most test
scenarios, you set a fixed ramp-up rate (threads per second) and only adjust
thread counts to increase load. The ramp-up period is then calculated by a
script:
1. Add "User Defined Variables" to test plan with:
THREAD_COUNT ${__P(thread.count, 1)}
RAMP_UP_RATE ${__P(thread.rampupRate, 1)}
2. In each Thread Group, set "Ramp-up Period (seconds)" to:
${__javaScript(${THREAD_COUNT} / ${RAMP_UP_RATE})}
or
${__jexl3(${THREAD_COUNT} / ${RAMP_UP_RATE})}
3. Add above properties to "user.properties" or a custom property file for
the -q option:
echo "thread.count=10">my.properties
echo "thread.rampupRate=2">>my.properties
jmeter -q my.properties
-------------------
Thank you
--Michael
________________________________
From: Milamber <[email protected]>
Sent: Monday, March 11, 2024 7:51 AM
To: [email protected] <[email protected]>
Subject: Re: Request Wiki permission to contribute
Hi Michael,
JMeter wiki is (more or less) obsolete. It is a hangover from the
previous version of the Wiki (using MoinMoin app).
In the JMeter documentation, we have this page about Thread Group:
https://jmeter.apache.org/usermanual/component_reference.html#Thread_Group
Or this page for best pratices:
https://jmeter.apache.org/usermanual/best-practices.html
If you provide the text about the "JMeter Ramp-up Rate" as best
practices or as note into the TG page, we can change the documentation.
Milamber
On 07/03/2024 19:44, Michael Chen wrote:
> Hi JMeter Team,
>
> I can't count how many times I've explained to junior developers how to
> adjust the "Ramp-up Period (seconds)" when he/she increases the "Number of
> Threads (users)" setting of a thread group.
>
> I like to contribute a Wiki or FAQ topic of "JMeter Ramp-up Rate". Even
> though the solution is simple, it will help everyone save time in between
> tests and have a reliable test plan. Please grant me edit permission to the
> JMeter Wiki as describe in the home page (warning box "Sorry, ..."):
>
> https://cwiki.apache.org/confluence/display/JMETER/Home
>
> Thank you
>
> Michael Chen
>
