Are these response times from JMeter TTFB or TTLB?
Response time is "time to last byte"
http://jmeter.512774.n5.nabble.com/JMeter-results-td516516.html
If you use Jmeter View Results Tree CSV output, then you have following time values:
Elapsed: TTLB - time to last byte
Latency: TTFB - time to first byte
Connect: time to connect to server, includes SSL Handling
All times are in msec.
JMeter Manual Glossary
Related
I created a test in JMETER
Add > Sampler > HTTP Request = Get
Server Name = dainikbhaskar.com
No. of threads(users) = 1
Ramp-up period (seconds) = 1,
Loop Count = 1
(My internet connection is a broadband one with the speed 50 MBPS)
I ran the test, ran successful, latency comes as 127 & sometimes less than 100 in subsequent executions.
I switched off my Wi-Fi, connected my laptop with mobile hotspot & executed the same test.
Now the latency is 607, 932, 373, 542, 915
I believe it's happening due to INTERNET CONNECTION SPEED as rest of the inputs are same.
Please confirm whether my perception is correct ? :)
It is correct.
You can also get network latency from https://www.speedtest.net/ or https://fast.com/
Latency is the time from sending the request until first byte of response arrives, so called "Time to first byte"
In JMeter's world:
Latency is Connect Time + Time to send the request + time to get the first byte of response
Elapsed time is Latency + time to get the last byte of the response.
More information:
JMeter Glossary
Understanding Your Reports: Part 1 - What are KPIs?
If you get 5x times higher latency for other connection it means that the majority of time is spend for the packets to travel back and forth. You can see the more precise picture by looking at Network tab of your browser developer tools or using a special solution like Lighthouse
in Jmeter http://jmeter.apache.org/usermanual/generating-dashboard.html
we can see the response time is second not millisecond
transaction response time example from Jmeter
but in my report it is millisecond not second, how can I config millisecond to second?
My test result
The report is in Milliseconds not in seconds and it’s not configrable.
So check if you are not receiving error pages with a 200 response code and add assertions:
http://www.ubik-ingenierie.com/blog/best-practice-using-jmeter-assertions/
Also check your are following the prerequisites for the report:
http://jmeter.apache.org/usermanual/generating-dashboard.html#configuration_requirements
I have an MVC Web aPI and I have trouble in comparing the response time of this API. I added some code to calculate the response time:
In the AuthorizationFilterAttribute OnAuthorization, I have the below code:
actionContext.Request.Headers.Add("RequestStartTime", DateTime.Now.ToString());
I have an ActionFilterAttribute, and an OnActionExecuted in which I have the below code:
string strRequestStartTime = actionExecutedContext.Request.Headers.GetValues("RequestStartTime").First();
DateTime dtstartTime = DateTime.Parse(strRequestStartTime);
TimeSpan tsTimeTaken = DateTime.Now.Subtract(dtstartTime);
actionExecutedContext.Response.Headers.Add("RequestProcessingTime", tsTimeTaken.TotalMilliseconds + "ms");
The response has the header "RequestProcessingTime" in milli seconds. The issue is whenever I try the same request using Postman/JMeter, I see that the response time is lesser than what I see in my Response. Why is this happening?
I think this is due to the fact the header does not consider time for request to reach the server and response to travel back, my expectation is that it shows only the time, required to process the request on the server side. So JMeter reports time as delta from the time when request has been sent and the time when the last byte has been received, which is more correct in terms of real user experience.
See definitions of "Elapsed Time", "Connect Time" and "Latency" in the JMeter Glossary. You may also be interested in How to Analyze the Results of a Load Test article which demonstrates the impact of network capacity on the overall performance
How to generte csv file and load csv using response time graph listener?
Can any one help me in detail that how we find response time in jmeter ?
If you run JMeter in command-line non-GUI mode as follows:
jmeter -n -t /path/to/your/test_plan.jmx -l /path/to/results_file.jtl
your results_file.jtl content will look like:
1409124780902,182,Logon,200,OK,Thread Group 1-1,text,true,214,0
1409124781219,153,Logout,200,OK,Thread Group 1-1,text,true,110,0
where second column is page response time in milliseconds.
Other values are:
"1409124780902" - current time stamp in ms
"182" - page response time
"Logon" - sampler name
"200" - Response Code
"OK" - Response Message
"Thread Group 1-1" - Parent Thread Group name, thread number and iteration.
"text" - response data type
"214" - response data size in bytes
"0" - latency
Once your test run is done you can open JMeter GUI and load this results_file.jtl into the listener of your choice.
You might also be interested in JMeter Plugins Extras Set which is capable of generating nice looking and easy understandable response-time related graphs to wit:
Response Times vs Threads
Response Times Distribution
Response Times Percentiles
You can get it by adding Reporters.
Please keep in mind Reporters is cpu and memory intensive components and thus should not be used while actual load test.
But for sample testing you can use it and for load test run you can get response time, average,throughput etc by saving output to jtl file in JMeter.
For normal/sample run
Aggregate report gives Average response time, min, max, median etc.
Summary report also gives the same with less details,
While performing actual run you can save output of these reporters in a jtl file. After the test results can be analyzed from jtl files.
No Of Requests - 2113 ;
Average Response time (s) - 123.5 ;
Response time/Sec (90% of Requests) - 142.9
Minimum Response time (s) - 2.4
Maximum response time (s) - 14.9
Error% -0.0
My Questions - For 2113 requests average response time is 123.5 secs I need to know what will be the response time of average one single request in 2113 requests
The average response time of a single request (1 out of 2,113) will be the value itself, but I'm sure this isn't your question.
Are you simply trying to locate the response time of each request after a given test plan has fully executed, that is, to see each of the 2,113 response times? If so, just add a Summary Report to your thread group. By doing this you'll need to specify an output file (which will get generated if it doesn't already exist) and will show you in detail each of the requests sent to the server, along with the HTTP response code, response time and other goodies.
UPDATE
Per the question posed in the comments via Ripon Al Wasim, the default extension of the results file is CSV, however this is configurable in /bin/jmeter.properties:
# legitimate values: xml, csv, db. Only xml and csv are currently supported.
#jmeter.save.saveservice.output_format=csv
As we can see, JMeter only appears to support XML and CSV.