theandym / Mjolnir

Heroku based distrubited load testing tool

Mjölnir

A Heroku based distributed load testing tool.

Configuration variables should be set as follows:

• BUILDPACK_URL: Specify the Heroku Ruby buildpack ("https://github.com/heroku/heroku-buildpack-ruby")
• TARGETS: A comma delimited list of targets to hit (ex. "http://my_cool_site.com/first_action,http://my_cool_site.com/second_action")
• WORKERS: The number of workers processes (default: 12)
• LENGTH The number of times each worker will hit each endpoint; use 0 to run continuously (default: 10000)

Then use the following command in the Procfile:

program: ruby ./killtheweb.rb start $TARGETS --workers=$WORKERS --length=$LENGTH

Each dyno should spin up 12 assaults on the endpoints provided, giving a max of about 6000 RPM per dyno assuming you are returning requests quickly.

Example:

heroku config:set \
  BUILDPACK_URL="https://github.com/heroku/heroku-buildpack-ruby" \
  TARGETS="http://my_cool_site.com/first_action,http://my_cool_site.com/second_action,http://my_cool_site.com/third_action" \
  WORKERS=12 \
  LENGTH=10000

heroku scale program=5

This will assault the three action endpoints with 60 concurrent worker. Each worker will access the URLs given 10000 times, and then quietly die. You'll need to scale down and up or restart the dynos to rerun the test.