I have started using jmeter 2.13 which has the support of pushing data to graphite. As per the documentation :
..a.count Number of responses for sampler name
..a.min Min response time for responses of sampler name
..a.max Max response time for responses of sampler name
Is the a.count per second? or what?.
In my graphite reports, I see them hovering around a particular value. Surely it is not for the load run till now.
The min/max : What time duration are they for?
Please help.
You can trace the tcp dump (host graphiteHostNameorIPaddress and port 2003) and see that each second backendListener sends the stats to the graphite.
samplerName.a.count is the number of executions for given sampler name during that second, min and max are also for that second.
Related
Just starting with jmeter and making some experiments I found something that looks kind of odd to me. I connected jmeter with influxdb and measured the avg. time response of one single request in a infinite loop. When I stopped the test I realized that the last time in the results csv created by jmeter is not the same as the one taken by influxdb. Specifically jmeter last measure is 13s higher than the one registered by influxdb. Any ideas on what could be happening?
I've tried to google it but haven't found any documentation or problem related
JMeter sends aggregated metrics, to wit it doesn't send each and every SampleResult but collects the results within some "window", default value is 5 seconds, controllable via backend_influxdb.send_interval JMeter Property
And metrics which are being sent are described here
You can try decreasing the 5 seconds window by amending the aforementioned backend_influxdb.send_interval JMeter property and setting it i.e. to 1000 ms so JMeter would send the data more often but it will create extra overhead so make sure that JMeter has enough headroom to operate and increasing metrics sending rate doesn't affect the overall throughput.
Objective : To Use Grafana log panel to display Apache JMeter Logs for an execution, using InfluxDB Backend Listener.
apache-jmeter-5.5
influxdb-1.8.10-1
grafana-8.5.0
I am using InfluxDBBackendListenerClient for my JMeter tests and grafana to display the the test metrics data into the dashboard.
I want to use the Grafana Logs Panel, to fetch Apache-Jmeter Execution Data,
I had accomplished this couple of years back and the log panel use to look like the below image:
Unfortunately, I don't have that dashboard and want to integrate the logs to my current dashboard.My Current logs dashboard looks like this below:
Influx Query: I have used the below mentioned influx query, I know something is wrong with the query.
I would really appreciate is anyone can help me resolve this query and aid me to get a dashboard in similar format as the first image,
JMeter's Backend listener doesn't send Apache JMeter logs, here is the list of the metrics which are supported as of JMeter 5.5
15.1.1 Thread/Virtual Users metrics
Thread metrics are the following:
<rootMetricsPrefix>test.minAT
Min active threads
<rootMetricsPrefix>test.maxAT
Max active threads
<rootMetricsPrefix>test.meanAT
Mean active threads
<rootMetricsPrefix>test.startedT
Started threads
<rootMetricsPrefix>test.endedT
Finished threads
15.1.2 Response times metrics
Response related metrics are the following:
<rootMetricsPrefix><samplerName>.ok.count
Number of successful responses for sampler name
<rootMetricsPrefix><samplerName>.h.count
Server hits per seconds, this metric cumulates Sample Result and Sub results (if using Transaction Controller, "Generate parent sampler" should be unchecked)
<rootMetricsPrefix><samplerName>.ok.min
Min response time for successful responses of sampler name
<rootMetricsPrefix><samplerName>.ok.max
Max response time for successful responses of sampler name
<rootMetricsPrefix><samplerName>.ok.avg
Average response time for successful responses of sampler name.
<rootMetricsPrefix><samplerName>.ok.pct<percentileValue>
Percentile computed for successful responses of sampler name. There will be one metric for each calculated value.
<rootMetricsPrefix><samplerName>.ko.count
Number of failed responses for sampler name
<rootMetricsPrefix><samplerName>.ko.min
Min response time for failed responses of sampler name
<rootMetricsPrefix><samplerName>.ko.max
Max response time for failed responses of sampler name
<rootMetricsPrefix><samplerName>.ko.avg
Average response time for failed responses of sampler name.
<rootMetricsPrefix><samplerName>.ko.pct<percentileValue>
Percentile computed for failed responses of sampler name. There will be one metric for each calculated value.
<rootMetricsPrefix><samplerName>.a.count
Number of responses for sampler name (sum of ok.count and ko.count)
<rootMetricsPrefix><samplerName>.sb.bytes
Sent Bytes
<rootMetricsPrefix><samplerName>.rb.bytes
Received Bytes
<rootMetricsPrefix><samplerName>.a.min
Min response time for responses of sampler name (min of ok.count and ko.count)
<rootMetricsPrefix><samplerName>.a.max
Max response time for responses of sampler name (max of ok.count and ko.count)
<rootMetricsPrefix><samplerName>.a.avg
Average response time for responses of sampler name (avg of ok.count and ko.count)
<rootMetricsPrefix><samplerName>.a.pct<percentileValue>
Percentile computed for responses of sampler name. There will be one metric for each calculated value. (calculated on the totals for OK and failed samples)
In order to be able to see JMeter log in Grafana you need to add it somehow to InfluxDB, I can think of the following options:
Periodically read it using JSR223 Test Elements and sending to InfluxDB HTTP endpoint using "normal" JMeter HTTP Request sampler
Come up with your own implementation of the Backend Listener which will be sending log file entries along with other metrics
Jmeter backend listener
I send the result value to influxdb through this backend listener
And I can receive this value.
data
data
However, I don't know what the meaning of this value is.
Can you help me? thank you!
The "meanings" are listed under Metrics Exposed JMeter user manual entry
15.1.1 Thread/Virtual Users metrics
Thread metrics are the following:
<rootMetricsPrefix>test.minAT
Min active threads
<rootMetricsPrefix>test.maxAT
Max active threads
<rootMetricsPrefix>test.meanAT
Mean active threads
<rootMetricsPrefix>test.startedT
Started threads
<rootMetricsPrefix>test.endedT
Finished threads
15.1.2 Response times metrics
Response related metrics are the following:
<rootMetricsPrefix><samplerName>.ok.count
Number of successful responses for sampler name
<rootMetricsPrefix><samplerName>.h.count
Server hits per seconds, this metric cumulates Sample Result and Sub results (if >using Transaction Controller, "Generate parent sampler" should be unchecked)
<rootMetricsPrefix><samplerName>.ok.min
Min response time for successful responses of sampler name
<rootMetricsPrefix><samplerName>.ok.max
Max response time for successful responses of sampler name
<rootMetricsPrefix><samplerName>.ok.avg
Average response time for successful responses of sampler name.
<rootMetricsPrefix><samplerName>.ok.pct<percentileValue>
Percentile computed for successful responses of sampler name. There will be one >metric for each calculated value.
<rootMetricsPrefix><samplerName>.ko.count
Number of failed responses for sampler name
<rootMetricsPrefix><samplerName>.ko.min
Min response time for failed responses of sampler name
<rootMetricsPrefix><samplerName>.ko.max
Max response time for failed responses of sampler name
.ko.avg
Average response time for failed responses of sampler name.
<rootMetricsPrefix><samplerName>.ko.pct<percentileValue>
Percentile computed for failed responses of sampler name. There will be one metric >for each calculated value.
<rootMetricsPrefix><samplerName>.a.count
Number of responses for sampler name (sum of ok.count and ko.count)
<rootMetricsPrefix><samplerName>.sb.bytes
Sent Bytes
<rootMetricsPrefix><samplerName>.rb.bytes
Received Bytes
<rootMetricsPrefix><samplerName>.a.min
Min response time for responses of sampler name (min of ok.count and ko.count)
<rootMetricsPrefix><samplerName>.a.max
Max response time for responses of sampler name (max of ok.count and ko.count)
<rootMetricsPrefix><samplerName>.a.avg
Average response time for responses of sampler name (avg of ok.count and ko.count)
<rootMetricsPrefix><samplerName>.a.pct<percentileValue>
Percentile computed for responses of sampler name. There will be one metric for each >calculated value. (calculated on the totals for OK and failed samples)
If you need more information on configuring JMeter/InfluxDB/Grafana - check out How to Use Grafana to Monitor JMeter Non-GUI Results - Part 2 article.
First off, I'm new to JMeter and wanted to clear some doubts regarding the relationship between Load time, Connect time, and Latency.
I found some resources that explain the relationship between these metrics:
Latency time – Connect time = Server Processing Time
Elapsed time – Latency time = Download Time
resource
And then another resource says this:
Response Time = Latency + Processing Time
Given below is one of the sampler results I got. If you take this into consideration, can we really comment on how long it took for the server to process the request?
NOTE: In this scenario, my plan is to analyze how much of a load the server had to withstand. I don't really care about the delay of connection establishing and passing around of data packets.
Basically, I want to know the connection between the 3 aforementioned metrics: Load time, Connect time, and Latency. Any help is greatly appreciated. Thanks in advance :)
You cannot say "how long it took for the server to process the request" by looking to JMeter results because:
Latency is time to first byte
Elapsed time is time to last byte
The request lifecycle looks like:
JMeter establishes the connection (connect time)
JMeter sends request body to the server (unknown)
Server processes the request (unknown)
Server sends the response to JMeter (unknown)
JMeter receives the first byte of the response (Latency)
JMeter receives the last byte of the response (Elapsed time)
So you cannot say what is the server processing time even with millisecond precision as JMeter can only get high-level network metrics, if you want to enrich your report with server processing time you need to use an APM or a profiler tool or at least something like JMeter PerfMon Plugin to get this form of information directly from the application under test.
This documentation explains the metrics :
https://jmeter.apache.org/usermanual/glossary.html
Latency:
JMeter measures the latency from just before sending the request to just after the first response has been received. Thus the time includes all the processing needed to assemble the request as well as assembling the first part of the response, which in general will be longer than one byte. Protocol analysers (such as Wireshark) measure the time when bytes are actually sent/received over the interface. The JMeter time should be closer to that which is experienced by a browser or other application client.
Connect Time:
JMeter measures the time it took to establish the connection, including SSL handshake. Note that connect time is not automatically subtracted from latency. In case of connection error, the metric will be equal to the time it took to face the error, for example in case of Timeout, it should be equal to connection timeout.
Load time or Elapsed time:
JMeter measures the elapsed time from just before sending the request to just after the last response has been received. JMeter does not include the time needed to render the response, nor does JMeter process any client code, for example Javascript.
In layman terms I would describe these terms as below:
Load time: total time taken by the request. First req to the final packet
Connect time: Time taken by the request to reach the server
Latency: time taken by request for first response. (if the response is small this can be same as load time)
I have 416 webservice API's to test . I am loading those url's from a CSV file . my test need to find an API which takes more than 2 sec to respond . I couldn't find a way to measure response time for an API .
I am using
Thread Users - 416
Ramp up Period - 1
Loop Count - 1
I have tried "View Results in Table" listener which shows the sample time . But the sample time does not show individual response time .
Please let me know if you find any solution ?
You shouldn't use listeners as View Results in Table in Load test because it consumes a lot of resources
this visualizer uses a lot of memory.
Use Duration Assertion instead, defined it with 2000 milliseconds in your case
Duration Assertion tests that each response was received within a given amount of time. Any response that takes longer than the given number of milliseconds (specified by the user) is marked as a failed response.
Add listener Summary report which has columns as average, minimum and maximum response time taken by a hit.You can also save this report by clicking on Save Table data button.
Also, add View Results Tree listener in which Sampler Result tab has all the details corresponding to that hit.
On the "Advanced" tab of the HTTP Request sampler (or even better HTTP Request Defaults) there is Timeouts section where you can define maximum value for establishing the connection and/or getting the response.
If JMeter fails to get the response within the time frame (in milliseconds) the relevant sampler will be marked as failed.
In order to see individual response times - add the variable from the CSV file as HTTP Request label (or prefix or postfix) - this way you will see the associated URLs in the listeners and in the HTML Reporting Dashboard :