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Load Testing like a
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irb(main):017:0> gatling.load_test(rails_app)
TypeError: can't convert Scala into Ruby
from (irb):16:in `load_test'
from (irb):16
from bin/irb:12:in `'
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a DSL emulates real
user behaviour
val scn = scenario("Login")
.exec(http("My website")
.get("/login")
.headers(headers_1)
.check(
regex("""""")
.saveAs("auth_token"))
.exec(http("Login")
.post("/login")
.headers(headers_5)
.param("csrf-token", "${auth_token}")
.param("username", "xxxx"))
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Scalable Engine :
Not a thread per user
Actor based
concurrency
Java 7
Asynchronous
Good GC
NIO framework
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Executive
summary
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Average & StdDev : never again !
average of 1.2 seconds and standard
deviation of 0.6 seconds
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Average & StdDev : never again !
average of 1.2 seconds and standard
deviation of 0.6 seconds
Unhappy users
are here
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Gatling
as a service
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Root cause analysis
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Need more data
Infrastructure monitoring
CloudWatch, collectd.org,...
profiling/instrumentation/sampling
in your code or through agent
à la NewRelic, home made with statsd,...
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Query
missing indexes
select * from db
select n+1
deadlock,
missing/bad cache
Resource limits
process / thread / connections pool
garbage collection / network
resource leak / cpu starvation
Latency
network
external api
rate limit
isolate services
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Opensource
Nice DSL to emulates real user behaviour
Scalable engine
Great reports/metrics by default
C I - able
Available “As a Service”
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More on the subject
https://flood.io/blog/13-stress-testing-jmeter-and-gatling
https://flood.io/blog/14-getting-started-with-gatling
https://flood.io/blog/27-socket-io-and-websockets-with-gatling
http://mestachs.wordpress.com/2012/03/31/performance-when-average-is-not-enough/
http://gatling-tool.org/cheat-sheet/
http://maxdemarzi.com/2013/02/14/neo4j-and-gatling-sitting-in-a-tree-performance-t-e-s-t-ing/
http://laurent.bristiel.com/getting-started-with-gatling-for-stress-test/
https://github.com/maxdemarzi/neo_permissions/blob/master/performance/src/test/resources/simulations/RandomPermissions.scala#L18
https://github.com/excilys/gatling-hands-on/blob/master/gatling-hands-on-demo/src/test/scala/computerdatabase/Step10.scala
https://wiki.jenkins-ci.org/display/JENKINS/Gatling+Plugin
http://puppetlabs.com/blog/puppet-gatling-and-jenkins-together
http://briancain.herokuapp.com/projects/puppetgatling
http://blog.newrelic.com/2013/01/22/understanding-new-relic-queuing/
http://www.webperformance.com/library/tutorials/CalculateNumberOfLoadtestUsers/
http://www.slideshare.net/ZeroTurnaround/stephane-landelleblastyourappwithgatling
https://twitter.com/GatlingTool
http://blog.roddet.com/2013/06/gatling2-new-inject-api/
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More on the subject
http://jsebfranck.blogspot.be/2013/09/gatling-dynamic-parameters-example.html
http://www.igvita.com/2014/03/26/why-is-my-cdn-slow-for-mobile-clients/
http://i.imgur.com/k0t1e.png
http://www.eecs.berkeley.edu/~rcs/research/interactive_latency.html