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
Related
I am using Locust and my code looks as below
class RecommenderTasks(TaskSet):
#task
def test_recommender_multiple_platforms(self):
start = round(time.time() * 1000)
self.client.get('recommendations', name='Test')
end = round(time.time() * 1000)
print(end - start)
class RecommenderUser(FastHttpUser):
tasks = [RecommenderTasks]
wait_time = constant(1)
host = "https://my-host.com/"
When I test with this code, I get the following output times
374
62
65
68
64
I am not sure why the very first task time alone is about 300+ ms and the rest are as expected. With this, my overall average time also increases. Could you please help me here?
Locust response times are measured from the time the initial request is sent to the server to the time a response is received. By default Locust reuses socket connections when available but creates new ones if an existing one isn't available. When connecting via HTTPS, there are a number of things that need to be done to set up the connection initially. Generally performance of that connection set up is dependent on things the server is doing. You could look into ways of reducing your connection setup time. How to do that will vary widely depending on your stack but you can find general principles in SO answers like this one:
how to reduce ssl time of website
I'm running load tests in gatling, and noticed when I ramp 250 users over 10 seconds, the report gives me an average of 31 req/s:
val combinedScenario = scenario("Combined")
.feed(UuidFeeder.feeder)
.exec(_.set("token", token))
.exec(saveData)
.exec(processDocumentRequest)
)
val scn = List(OAuthRequest.inject(atOnceUsers(1)),
combinedScenario.inject(nothingFor(5 seconds),
rampUsers(250) over (10 seconds)));
setUp(scn).protocols(httpConf).maxDuration(60 minutes)
However, when I surround the scenario in a forever loop and put a 60 second pace in between each set of requests, the report then says I average about 8 req/s:
val combinedScenario = scenario("Combined")
.feed(UuidFeeder.feeder)
.exec(_.set("token", token))
.forever(
pace(60 seconds)
.exec(saveData)
.exec(processDocumentRequest)
)
Is this simply because the report factors in the 50 seconds in between iterations where 0 requests are being sent? Can I assume that it's still sending around 31 req/s for the short bursts of requests being sent each minute?
Yes - the reports just show what the actual throughout during the scenario was, not some hypothetical maximum. The number you get could be constrained by your scenario or by the application under test. You would need to run some experiments to confirm.
With the pace in the scenario, you should also be able to increase the number of concurrent users, based on your initial testing
I have run load testing for website but when I have increased no. of users , I can see throughput time seems increasing instead of decrease.
Test Case 1 :
No. of Threads : 15
Ramp up time : 450 [As I want to put delay of 30 seconds between 2 users]
Loop count : Forever
Scheduler : 1800 Seconds [As I want to run test for 30 minutes]
In Http requests I have added 10 pages and each request has constant timer with 30000 miliseconds as I need to put delay of 30 seconds between 2 requests.
Now When I see result of Aggregate Report , it shows me Throughput 3/min for each request.
Test Case 2 :
No. of Threads : 30
Ramp up time : 900 [As I want to put delay of 30 seconds between 2 users]
Loop count : Forever
Scheduler : 1800 Seconds [As I want to run test for 30 minutes]
In Http requests I have added 10 requests/pages and each request has constant timer with 30000 miliseconds as I need to put delay of 30 seconds between 2 requests.
Now When I see result of Aggregate Report , it shows me Throughput 6/min for each request.
I am confuse that how it is possible? If my users are increased from 15 to 30 then it should have more load on server and throughtput should decrease like 1/min or 2/min.
Please let me know what I am doing wrong here.
Throughput is no. of completions per unit time. (A completion can be a http request/db request in short anything that needs to be executed and needs >0 execution time.)
Ex. req per sec or req per min etc.
By definition of throughput in JMeter, it is calculated as total no. of requests/total time.
In your first case, no. of requests generated in 1800 seconds with 3 second delay in every request by 15 users are x. Thus throughput is x/30 i.e. 3 it means ~90 requests were generated (verify this from aggregate report or other reporter.)
In your second case, everything else is same but no. of users are doubled which creates ~double no. of requests in given time which is (1800 seconds)
Thus according to formula, no. of requests generated/total time.
Throughput in 2nd case = 2x/30 = 2*throughput in 1st case
Which is 6/min. (Correctly shown by JMeter.)
Key here is to check no. of requests generated in both cases.
I hope this clears your confusion. Let me know if you need further clarification. BTW "when I have increased no. of users , I can see throughput time seems increasing instead of decrease." is not always true.
Throughput increased by factor of 2.
Test Case 1: - 3 requests per minute - 1 request each 20 seconds
Test Case 2: - 6 requests per minute - 1 request each 10 seconds
As per JMeter Glossary:
Throughput is calculated as requests/unit of time. The time is calculated from the start of the first sample to the end of the last sample. This includes any intervals between samples, as it is supposed to represent the load on the server.
The formula is: Throughput = (number of requests) / (total time).
You may also be interested in the following plugins:
Server Hits Per Second
Transactions Per Second
or alternatively Loadosophia.org service which can convert your JMeter .jtl results files into easy-understandable professional load report
I have the next test plan in JMeter:
on the screenshot you can see the settings for the 1st ThreadGroup, wich has 50% of common amout of request in test plan (in each Thread Group are 10 different subrequests placed).
So, +1 request per second is added in average using these settings.
Then I ran this test and saw this picture (Error % column):
I save errors in file and all these errors have the same text:
<sample t="30129" lt="0" ts="1356710138314" s="false" lb="WebService(SOAP) Request 1" rc="000" rm="**Connection reset**" tn="jp#gc - Stepping Thread Group1 3-247" dt="text" by="0"/>
Server's cpu screenshot:
and for database:
After the errors have appeared my comp started work slowly and slowly (although the errors stopped to appear further)...
And in the same time the server's cpu progressively dropped to 0.
Could you tell me, please,
What is the reason of this error?
Have I reached the server timeout? (Because Max is more than 30s in the table).
UPD. I have rerun test with next settings: 1000 users per 02:46:40 (+1 Thread Group per 10 second and 10 requests inside each new Thread in the Loop).
I.e. I have reduced the time of test and total Thread Groups by 2 times, but save intensivity of Thead's adding.
The results are the same (including cpu usage on the server).
I've received the error «Connection reset» after 990 thread started. There are screenshots:
Any idea?
First, WebService(SOAP) Request is not the best way to test Webservices in JMeter, it will be deprecated in upcoming 2.9 version.
HTTP Sampler is the one to choose as it performs much better.
Second, Connection Reset means your server has cut connection. It could be coming from the CPU which seems high but it's not sure.
If what you call "my comp" is the computer hosting JMeter started working slowly then your JMeter instance is overwhelmed by the number of threads (2003 or more?) you've configured. It can come from a lot of factors, read this:
http://www.dzone.com/links/see_how_to_make_jmeter_run_thousands_of_threads_w.html
I have the next test plan in JMeter:
on the screenshot you can see the settings for the 1st ThreadGroup, wich has 50% of common amout of request in test plan (in each Thread Group are 10 different subrequests placed).
So, +1 request per second is added in average using these settings.
Then I ran this test and saw this picture (Error % column):
I save errors in file and all these errors have the same text:
<sample t="30129" lt="0" ts="1356710138314" s="false" lb="WebService(SOAP) Request 1" rc="000" rm="**Connection reset**" tn="jp#gc - Stepping Thread Group1 3-247" dt="text" by="0"/>
Server's cpu screenshot:
and for database:
After the errors have appeared my comp started work slowly and slowly (although the errors stopped to appear further)...
And in the same time the server's cpu progressively dropped to 0.
Could you tell me, please,
What is the reason of this error?
Have I reached the server timeout? (Because Max is more than 30s in the table).
UPD. I have rerun test with next settings: 1000 users per 02:46:40 (+1 Thread Group per 10 second and 10 requests inside each new Thread in the Loop).
I.e. I have reduced the time of test and total Thread Groups by 2 times, but save intensivity of Thead's adding.
The results are the same (including cpu usage on the server).
I've received the error «Connection reset» after 990 thread started. There are screenshots:
Any idea?
First, WebService(SOAP) Request is not the best way to test Webservices in JMeter, it will be deprecated in upcoming 2.9 version.
HTTP Sampler is the one to choose as it performs much better.
Second, Connection Reset means your server has cut connection. It could be coming from the CPU which seems high but it's not sure.
If what you call "my comp" is the computer hosting JMeter started working slowly then your JMeter instance is overwhelmed by the number of threads (2003 or more?) you've configured. It can come from a lot of factors, read this:
http://www.dzone.com/links/see_how_to_make_jmeter_run_thousands_of_threads_w.html