Set Up Profiling

With profiling, Sentry tracks your software's performance by sampling your program's call stack in a variety of environments. This feature collects function-level information about your code and enables you to fine-tune your program's performance. Sentry's profiler captures function calls and their exact locations, aggregates them, and shows you the most common code paths of your program. This highlights areas you could optimize to help increase both the performance of your code and increase user satisfaction, as well as drive down costs.

Enable Performance Monitoring

Profiling depends on Sentry’s performance monitoring product being enabled beforehand. To enable performance monitoring in the SDK:

Sentry.init do |config|
  config.dsn = 'https://examplePublicKey@o0.ingest.sentry.io/0'
  config.traces_sample_rate = 1.0
end

Check out the performance setup documentation for more detailed information on how to configure sampling. Setting the sample rate to 1.0 means all transactions will be captured.

Enable Profiling

We use the stackprof gem to collect profiles for Ruby.

First add stackprof to your Gemfile and make sure it is loaded before sentry-ruby.

# Gemfile

gem 'stackprof'
gem 'sentry-ruby'

Then, make sure both traces_sample_rate and profiles_sample_rate are set and non-zero in your Sentry initializer.

# config/initializers/sentry.rb

Sentry.init do |config|
  config.dsn = "https://examplePublicKey@o0.ingest.sentry.io/0"
  config.traces_sample_rate = 1.0
  config.profiles_sample_rate = 1.0
end