CODEWITHSUNDEEP
jsonjmeter
ghallas
ghallas

Reputation: 305

Performance test with jmeter based on response field

I am trying to run some performance tests on an ElasticSearch-backed JSON REST API, to try the impact of different filters on ElasticSearch.

I don't want to use the standard jmeter output, because there is too much clutter due to the over-the-wire time.

My API returns the time taken on ElasticSearch based on the took (tookInMillis in the java RestHighLevelClient we are using) property of the org.elasticsearch.action.search.SearchResponse. This is returned in a time_taken property of the API response.

This is a sample response

{
    "page_size": 1,
    "current_page": 1,
    "number_of_pages": 2495,
    "total_results": 2495,
    "additional_results_exist": false,
    "time_taken": 55,
    "results": [
        {       
                // object here, we don't really care
        },
        {            
                // object here, we don't really care
        }
    ],
    "request_id": "06e8001c-caf2-46f4-bf16-08c8d1ceb079"
}

So, the use case would be:

I have found several references, mentioning JSON extractor, RegEx extactor, beanshell, but I didn't manage to get anything to work.

So, I would really appreciate a minimal working setup.

The jmeter version I am using is 5.4.3

Upvotes: 0

Views: 191

Answers (1)

Dmitri T
Dmitri T

Reputation: 167992

We would really appreciate if you could provide the response from the ElasticSearch because we don't have any idea of how does it look like hence we cannot come up with a proper JSON Extractor setup.

I don't know what "time_taken" is, in Elastic Search it's called took:

{
  "took": 1, <--------------- I assume you want this value
  "timed_out": false,
  "_shards": {
    "total": 1,
    "successful": 1,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 0,
      "relation": "eq"
    },
    "max_score": null,
    "hits": [
      
    ]
  }
}

If this is the case it can be obtained using JSON Extractor configured like:

enter image description here

If you want to utilize JMeter listeners you can create a "fake" sampler using i.e. Dummy Sampler where you can control response time:

enter image description here

This way the "fake" sampler will have response time from the took ElasticSearch response JMeter will calculate the percentiles.

Demo:

enter image description here

Upvotes: 1

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