This causes the same test in JMeter 5 to have longer response times, lower TPS and need more resources to execute. In short: the connection in JMeter 4 is kept open between iterations and not in version 5. If you don’t want this behavior, set httpclient.reset_state_on_thread_group_iteration = false ” “Since JMeter 5.0, when using default HC4 Implementation, JMeter will reset HTTP state (SSL State + Connections) on each thread group iteration. After a little research, we found that the main difference in this behavior was located in the connection time and when we reviewed the documentation of the changes in JMeter, we came across this: When executing the same test with JMeter 4.0, we found that we had considerably less response time, more requests per second and also less CPU usage than with JMeter 5.1. To understand why this was happening, after analyzing different things, we wanted to try a previous version to verify if this also was the case. We could also see that the response times were high, and consequently, the number of requests per second was low.
Apache jmeter stable release generator#
When executing tests with the latest available version of JMeter (5.1), we found that with about 30 virtual users, the use of the load generator CPU was already saturated, reaching 100% for almost the entire execution of the test.
Apache jmeter stable release how to#
In this post, written with the help of my Abstracta colleagues, we’ll tell you how we reached this conclusion and discuss the implications of it for making the decision of how to model your test to simulate your system’s users in the best way. On one hand, JMeter 5 requires more resources to execute, and on the other, the registered response time will be longer than when the connection is reused (as it is in JMeter 4).īoth consequences are due to the opening of a new connection requiring more resources, which takes more time than using one that’s open already. Using JMeter 5? Understand this key difference that will impact how you set up your tests…Īt Abstracta, we’ve been experimenting recently with JMeter 4 and 5 (the latest versions to date) and we found a very important difference in the way they behave and it’s important to know it in order to simulate load the way you’d like.īasically, the connections in JMeter 4 are kept open between iterations and in JMeter 5 they are completely restored, which leads to two implications that will drastically change test results:
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