Incorrect request_rate

[swainayasha]

Version info:

VERSION INFO:

Artillery: 2.0.9
Node.js: v18.20.2
OS: darwin
Running this command:
artillery run load-test-sgs.yaml

I expected to see this happen: Im expecting a request_rate of 5/sec with a total request of 600 and the script is running for 2min. but how is it for 3/sec in the summary report ??

I have the below arrival rate and ramp up time defined in my yaml script . Im expecting a request_rate of 5/sec but in the summary report the request_rate is 3/sec . How is that possible ?
phases:
- name: Warm Up
duration: 60
arrivalRate: 5
- name: Ramp Up
duration: 60
arrivalRate: 5
rampTo: 5

All VUs finished. Total time: 2 minutes, 10 seconds

---

Summary report @ 09:09:17(+0530)

http.codes.200: ................................................................ 95
http.codes.500: ................................................................ 505
http.downloaded_bytes: ......................................................... 240055
http.request_rate: ............................................................. 3/sec
http.requests: ................................................................. 600
http.response_time:
min: ......................................................................... 2327
max: ......................................................................... 7342
mean: ........................................................................ 6884.5
median: ...................................................................... 7260.8
p95: ......................................................................... 7260.8
p99: ......................................................................... 7260.8
http.responses: ................................................................ 600
vusers.completed: .............................................................. 600
vusers.created: ................................................................ 600
vusers.created_by_name.Check Run Workflow for SearchCarExistornot: ............. 600
vusers.failed: ................................................................. 0
vusers.session_length:
min: ......................................................................... 3085.9
max: ......................................................................... 8379.3
mean: ........................................................................ 7644
median: ...................................................................... 8024.5
p95: ......................................................................... 8024.5
p99: ......................................................................... 8024.5

explanation

Instead, this happened:

explanation

Files being used:

<relevant yaml/js/csv go here>

[hassy]

hi @swainayasha 👋 Arrival rate is not the same as the request rate. An arrival = a new VU. Each VU can make multiple requests. I would guess your script has VUs that make multiple requests. If you look at the http.response_time stats you'll see that the fastest request took 2.3s. So let's say VU make two requests one after another, and the first one takes 2.3s. That would give the request rate for one VU of: 2/2.3* = 0.86 requests/second. Let's say you have 5 of those VUs arriving at the same time. You'd have 10 requests sent in 2.3s, so your request rate is 4.3 and not 5. In your specific case since requests can take up to 7.3s to be served, your overall request rate would be even lower.