Load testing made easy

Stéphane Landelle @ eBusiness Information @slandelle

Load Testing"Gatling"Demo

Load Testing"Gatling"Demo

Load Testing"Gatling"Demo

Load testing?

About performance About server side In “real” conditions

Performance What for?"

It’s all ‘bout the money!"Conversion rates"Platform costs

Performance What for?"

(from business POV)

""Results/page : 10 => 30

è +500 ms "è -20% pages seen

è -1 % sales"è Estimated loss: $160M/y

+100 ms

Performance"What for?"

(from dev POV) Fun!"

(happens to be useful too)"Anticipate"Reproduce"

Train

How?"""

How?""

Define goals"

èRequirements

How?""

Analyze"

èData"èMonitor

How?""

Simulate"

èBehaviors"èInjector

How?""

Iterate!!!"

Jmeter, The Grinder, LoadUI, Tsung, Locust, Load Runner, Rational, NeoLoad…

Issue #1

High Performance

1 user = "1 thread

50 threads on a JVM

With 2000 threads

Blocking I/O

Threads ?"Waiting…

… and sleeping

JMeter 2.8 perf test, expecting 300 tr/sec

Can you trust your results ?

JMeter reference test with Gatling, expecting 300 tr/sec

Usability Issue #2

Listen, it's not that complicated...

Graphical User Interface

Maintainability Issue #3

What is this change about ?

Gatling can change all that !

Synchronous""

1user=1thread""

Blocking I/O

- Asynchronous - Actor model - Non blocking I/O

Actors

NIO

Reach new limits

From the Play2 Computer-Database sample. (cf: https://github.com/gatling/computer-database)

Scenario "Scala code"DSL

"= =

Use the rich DSL … Checks

regex / css / xpath / jsonPath find / findAll / count is / in / not / whatever

Structures doIf / repeat / during / asLongAs randomSwitch / roundRobinSwitch

Error handling tryMax / exitBlockOnFail

Feeders csv / tsv / jdbc

… or write your own "Scala code…

… or use the Recorder

•  Maven Plugin •  Maven archetype (run in IDE) •  Jenkins plugin •  Graphite live reporting

Coming soon…

•  Websockets, JDBC… •  Clustering

Demo

http://gatling-tool.orghttp://github.com/excilys/gatling@GatlingTool