jmeter
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apache
When in low memory, threads become almost sequential and many errors occur
Expected behavior
this is my heap config : "${HEAP:="-Xms5g -Xmx5g -XX:MaxMetaspaceSize=1024m"}"
This memory and CPU look very normal
this is part of runtime log
Actual behavior
I want to know why I behave strangely under high pressure and if it can be resolved
Steps to reproduce the problem
there are my plugins
JMeter Version
5.4.1
Java Version
java version "1.8.0_144" Java(TM) SE Runtime Environment (build 1.8.0_144-b01) Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)
OS Version
centos7
It is hard to tell what exactly causes your problems. There are many things involved, which could go wrong. A few suggestions to look at:
- If you suspect heap space limitations, have a look at the JVM statistics during the run. jstats, visualvm or jmc might help you detect those.
- What I suspect is, that you ran out of other resources like tcp connections (on client, server or somewhere in between). That might lead to a synchronization of your simulated clients, which then might overload the target.
- Try to connect to the server under test when those SocketExceptions occur. If you are not able to connect to the server too, than have a look at the server, is it overloaded?
