Puma server configuration in Ruby on Rails - Mini Project: Build & Apply

Puma Server Configuration

📖 Scenario: You are setting up a Ruby on Rails application to run with the Puma web server. Puma needs a configuration file to define how it handles threads, workers, and ports.

🎯 Goal: Create a config/puma.rb file that sets up Puma with a thread pool, worker count, and port number for your Rails app.

📋 What You'll Learn

Create a thread pool size range with minimum 5 and maximum 5 threads

Set the port to 3000

Set the number of workers to 2

Add a preload_app! directive to optimize memory usage

💡 Why This Matters

🌍 Real World

Puma is a popular web server for Ruby on Rails apps. Configuring it properly ensures your app runs efficiently and handles multiple requests smoothly.

💼 Career

Knowing how to configure Puma is essential for Rails developers working on production-ready applications and deploying to servers.

1

Create thread pool size range

Create a variable called threads_count and set it to 5. Then use threads threads_count, threads_count to configure Puma's thread pool size.

Ruby on Rails

# Your code here

Need a hint?

Use the threads method with two arguments for minimum and maximum threads.

2

Set the port number

Add a line to set the Puma server port to 3000 using port 3000.

Ruby on Rails

threads_count = 5
threads threads_count, threads_count
# Your code here

Need a hint?

Use the port method with the port number as argument.

3

Set the number of workers

Add a line to set the number of Puma workers to 2 using workers 2.

Ruby on Rails

threads_count = 5
threads threads_count, threads_count
port 3000
# Your code here

Need a hint?

Use the workers method to specify the number of worker processes.

4

Add preload_app! directive

Add a line with preload_app! to enable application preloading for better memory usage.

Ruby on Rails

threads_count = 5
threads threads_count, threads_count
port 3000
workers 2
# Your code here

Need a hint?

This directive tells Puma to load the app before workers fork.