https://issues.apache.org/bugzilla/show_bug.cgi?id=48889
Summary: Wrong response time with mode=Statistical and
num_sample_threshold > 1
Product: JMeter
Version: 2.3.4
Platform: PC
OS/Version: All
Status: NEW
Severity: major
Priority: P2
Component: Main
AssignedTo: [email protected]
ReportedBy: [email protected]
I’ve got a master-slave setup and need to do statistical sampling because
otherwise the master dies on OutOfMemory. I use an Aggregate Graph/Report as
recommended. The calculated values for hits/sec reported by the listeners are
wrong.
To analyze the situation use I the following testplan:
- Threadgroup with 10 threads running for 100 iterations
- BeanShell Sampler sleeping for 500 millis
- AggregateGraph/Report
Now the results must be more or like:
- Hits/sec just below 20 (like 19.6)
- Average response time approx 500 millis
Local execution delivers this result.
Set num_sample_threshold=1 and time_threshold=3600 delivers this result.
Set num_sample_threshold=100 time_threshold=3600 delivers
- Hits/sec 19.7
- Average response time 56!
The response time varies with the sample_threshold but always is way to low.
The higher the sample_threshold the higher the delta between real and reported
response time
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