What’s new in Rails 6?

With the official release of Rails 6 just around the corner, we round up all the major new features coming your way. It is an exciting release due to some big features coming upstream from the Basecamp and GitHub projects. Amongst the many minor updates, useful tweaks and bug fixes, Rails 6 will ship with two completely new frameworks: ActionText and ActionMailbox, and two big scalable-by-default features: parallel testing and multiple database support. So set your Gemfile to get Rails 6.0.0.rc1 and let’s get started! Read more

Unicorn vs. Puma vs. Passenger: which app server is right for you?

The Ruby app server ecosystem has consolidated around three app servers: Unicorn , Puma , and Passenger 5 . What specific problems must an app server solve for Ruby? How do you pick the right app server? Is there a need for each of these app servers in ... Read more

Identifying bottlenecks and optimizing performance in a Python codebase

Optimizing performance in Python What does "Optimizing" code mean anyway? The term "optimization" can apply to a broad level of metrics. But two general metrics of most interest are; CPU performance (execution time) and memory footprint. For this post, you can think of an optimized code as the one which ... Read more

Continuous Deployment Tools

Software development has changed rapidly over the last ten years. Many companies have moved away from the traditional waterfall development model to an agile methodology, and this has meant embracing continuous integration and continuous delivery practices. But how about taking it one step further with continuous deployment? Are you deploying to production automatically, without any human intervention? Some of the major products we rely on everyday are. We take a look at some of the best continuous deployment tools and put them head-to-head. Read more

2019 PHP Monitoring Options

There is no denying the popularity of PHP. It has been a constant force in the web development world since its release way back in 1995. And now in 2019, thanks to Laravel, it is still going as strong as ever! Here at Scout, recently we have been working hard on providing a PHP performance monitoring agent to sit alongside our existing ruby, python and elixir agents. Prior to us releasing this PHP agent, let’s take a look at the PHP ecosystem to see how Scout can complement the existing monitoring landscape. Read more

Understanding Disk I/O - when should you be worried?

Our co-author today is Christian Paredes , Senior System Administrator at Blue Box Group , a Ruby on Rails-focused web host that specializes in providing the operations expertise required to keep powerful apps running at peak performance. Christian keeps Blue Box Group’s internal infrastructure in top-shape and provides tier 3 ... Read more

Meet Scout's new transaction timeline view

Today we're happy to announce that our transaction timeline view has exited BETA and is now available for all Ruby apps monitored by Scout. Read more

Making sense of ActiveRecord joins, includes, preload, and eager_load

Like a pair of jumper cables, ActiveRecord's joins , includes , preload , and eager_load methods are incredibly useful, but also very dangerous when used incorrectly. Knowing when and where to use each approach - and even when to combine them - can save you considerable trouble as your app ... Read more

Understanding Heroku Error Codes with Scout APM

If you are hosting your application with Heroku, and find yourself faced with an unexplained error in your live system. What would you do next? Perhaps you don’t have a dedicated DevOps team, so where would you start your investigation? With Scout APM of course! We are going to show you how you can use Scout to find out exactly where the problem lies within your application code. We are going to walk through two of the most common Heroku error codes and show you how to diagnose the problem with Scout quickly and efficiently. Read more

How to use Mint, an awesome HTTP library for Elixir - Part 02

In our previous post we looked at how to set up and use Mint to make a simple GET request to fetch the contents of a README file from a Github repository. In this post let us continue building our Awesome Toolbox and add some more functionality. Read more

Get Started with a 14-day, credit-card less trial.

Isolate performance issues without the guesswork. Hunt down N+1, Memory Bloat, Slow Queries and more to the exact line of code faster than ever before.