No "count" display on the group metrics

Grafana k6 OSS Support
1

Any suggestion why “count” does not display on the cli summary?

const t01_trend = new Trend("T01_launch");
// ...
export let options = {
  thresholds: {
    summaryTrendStats: ["min", "max", "avg", "p(90)", "p(95)", "p(99)", "count"]
  },
};

In summary cli

T01_launch....................: min=21.531   max=21.531    avg=21.531    p(90)=21.531    p(95)=21.531     p(99)=21.531

Referring to this commit, it should be able to support the count option.

2

Hi,

that feature isn’t publicly released yet, though it will be part of the upcoming v0.26.0 release, planned for this week. Keep a lookout at the releases page, though in the meantime you can compile and use k6 master, where this should work.

Also note to follow only the official GitHub - grafana/k6: A modern load testing tool, using Go and JavaScript - https://k6.io repository, as 3rd-party forks might not be up to date and are not officially supported.

3

Also, you’ve tried to define the summaryTrendStats option inside of thresholds, but it is a global option. Here’s a complete script that demonstrates it:

import http from "k6/http";
import { Trend } from "k6/metrics";

const totalDuration = new Trend("total_duration", true);

export let options = {
    iterations: 5,
    summaryTrendStats: ["min", "max", "avg", "p(90)", "p(95)", "p(99)", "count"],
};

export default function () {
    let responses = http.batch([
        ["GET", "https://test.loadimpact.com/"],
        ["GET", "https://test.loadimpact.com/style.css"],
        ["GET", "https://test.loadimpact.com/images/logo.png"]
    ]);

    totalDuration.add(responses.reduce((acc, resp) => acc + resp.timings.duration, 0));
}

With the latest k6 master (either compiled yourself, or using the Docker master image tag), you’d get something like this:

    duration: -,  iterations: 5
         vus: 1, max: 1

    done [==========================================================] 5 / 5

    data_received..............: 43 kB  37 kB/s
    data_sent..................: 2.8 kB 2.4 kB/s
    http_req_blocked...........: min=1.41µs   max=473.47ms avg=63.13ms  p(90)=284.08ms p(95)=473.47ms p(99)=473.47ms count=15
    http_req_connecting........: min=0s       max=138.97ms avg=9.26ms   p(90)=0s       p(95)=41.69ms  p(99)=119.51ms count=15
    http_req_duration..........: min=137.89ms max=140.9ms  avg=139.47ms p(90)=140.53ms p(95)=140.69ms p(99)=140.85ms count=15
    http_req_receiving.........: min=52.73µs  max=312µs    avg=126.61µs p(90)=232.36µs p(95)=290.89µs p(99)=307.78µs count=15
    http_req_sending...........: min=10.52µs  max=210.84µs avg=39.99µs  p(90)=59.26µs  p(95)=113.56µs p(99)=191.38µs count=15
    http_req_tls_handshaking...: min=0s       max=330.2ms  avg=22.01ms  p(90)=0s       p(95)=99.06ms  p(99)=283.97ms count=15
    http_req_waiting...........: min=137.66ms max=140.78ms avg=139.3ms  p(90)=140.31ms p(95)=140.47ms p(99)=140.72ms count=15
    http_reqs..................: 15     12.782741/s
    iteration_duration.........: min=138.27ms max=614.51ms avg=234.8ms  p(90)=425.14ms p(95)=519.83ms p(99)=595.57ms count=5 
    iterations.................: 5      4.260914/s
    total_duration.............: min=413.85ms max=421.41ms avg=418.41ms p(90)=420.78ms p(95)=421.1ms  p(99)=421.35ms count=5 
    vus........................: 1      min=1 max=1
    vus_max....................: 1      min=1 max=1
1 Like
4

thanks @imiric. I will take note release note in future.

@neillb
I have encountered error below:-
ERRO[0001] TypeError: Object has no member ‘reduce’

is this option available at the latest build v0.25.1?

My mistake, i just realised v0.26.0 is available to use now. The code is working perfectly fine.
However, do you have any example of just with http.get/http.post?

One more question, possible to configure the count only store the HTTP200 response time / pass through the check() function.

Or even position to track the number of pass count / number of fail count?

5

One more question, possible to configure the count only store the HTTP200 response time / pass through the check() function.
Or even position to track the number of pass count / number of fail count?

I don’t understand your question, sorry.

6

Let say I have 1 VU with a total of 5 iteration test execution.

3 out of 5 returned HTTP200
2 out of 5 returned HTTP502

Based on the current result display on stdout, no matter pass or fail transaction will be consolidated into a single group. The count value will be 5.

However, I would like to see the test result only consolidate the pass transaction, and also indicate the number of fail transaction.

min |max |avg |pass trans |fail trans
x |x |x |3 |2

7

I’m still not sure I fully understand your question, but you should be able to achieve what you want with a combination of custom Trend (Trend) and Count (Counter) metrics and if statements based on the response.status value (Response), right?

8

Yeah, I got your idea. Currently I am using custom metrics (rate) to track the total transaction. TQVM.