I integrated my Gatling tests with Grafana + InfluxDB instance. Overall it works great - the metrics are sent and I can watch at real time the progress of my load tests. But I noticed some discrepancy (I think) between what is in the generated report/documentation/grafana.
In this particular scenario I am ramping up to 600 users per second during 60 seconds and then keeping this load also for 60 seconds.
In the docs it says that:
Active Users
At a given second, active users are computed as:
the number of active users at the previous second
the number of users who started during this second
the number of users who finished during the previous second
And by looking at the Gatling HTML report active users (orange line) it looks ok - around ~600 users and at the end number of active users increases because my machine can’t keep up with the requests. On the other hand on my grafana dashboard I can see that most of the time the number of active users is 0, only when my users are starting to stack up I am getting the number of active users != 0.
The second thing. In the docs it says that
Request metrics
Requests metrics give you, for each request (or all requests using allRequests) and by status (OK, KO and both) :
count : requests/sec
min and max : Min and Max response time for the request
percentilesXX : 1st, 2nd, 3rd and 4th percentiles, as defined in gatling.conf (defaults are 95th and 99th percentiles)
but comparing grafana and generated report I can see that the “request-metrics” graph is more similar to the “Number of responses per second” one - and looking at the code of GraphiteDataWriter it records the response not the request event:
override def onMessage(message: LoadEventMessage, data: GraphiteData): Unit = message match {
case user: UserMessage => onUserMessage(user, data)
case response: ResponseMessage => onResponseMessage(response, data)
case _ =>
}
On the other hand on my grafana dashboard I can see that most of the time
the number of active users is 0, only when my users are starting to stack
up I am getting the number of active users != 0.
Can you reproduce with current master/snapshot?
but comparing grafana and generated report I can see that the
"request-metrics" graph is more similar to the "Number of responses per
second" one
I wanted to use newer version of Gatling to test the active users that are pushed to graphite. The thing is - I have normal Scala project with gatling-sbt-plugin which I am using to execute gatling as a test framework. I can see that there are snapshots of Gatling: https://oss.sonatype.org/content/repositories/snapshots/io/gatling/highcharts/gatling-charts-highcharts/ but I can’t find “snapshots” of gatling-sbt-plugin. Will 2.1.6 version of gatling-sbt will work with Gatling 2.2 after changing versions of
but I can't find "snapshots" of gatling-sbt-plugin.
AFAIK, sbt plugins have to be deployed in an Ivy repository and can't be
deployed in a maven one. And I'm not sure Bintray provides a repo for
snapshots. Sadly...
Will 2.1.6 version of gatling-sbt will work with Gatling 2.2 after
changing versions of
I found your github repo and like what you have done for AWS live metrics. I have a question. Were you able to see performance metrics for all the load generators?
