Welcome!

Ruby-On-Rails Authors: Liz McMillan, Pat Romanski, Elizabeth White, Hovhannes Avoyan, Yeshim Deniz

Related Topics: Ruby-On-Rails, Java IoT, Open Source Cloud, Machine Learning , Agile Computing, Cloud Security

Ruby-On-Rails: Article

Instrumenting Ruby on Rails with TraceView

In under 10 minutes

TraceView by AppNeta provides deep performance monitoring of web applications.

It gives you insight into your web application performance such as this:

and a per request drill-down that shows you the nitty gritty detail of where time is spent in individual requests (full-size):

and even end-user monitoring:

I run it on Gameface and PasswordPusher - it’s an essential tool in identifying problem areas, performance bottlenecks and simply poor performing code. (Read: ActionView)

Disclaimer: I authored the Ruby instrumentation for Traceview so I may be a bit biased. …but with good reason!

Installation
Installing TraceView consists of two parts: 1) installing the system daemon on your host and 2) installing the Ruby gem in your application.

Why a system daemon? TraceView uses a system daemon to collect instrumentation from sources beyond application code such as host metrics, Apache or Resque.

The system daemon is installed with two commands that can be pasted into your shell. An account specific version of these commands are available in your TraceView dashboard once you create an account. (Under Settings; App Configuration; Trace New Hosts)

And the gem for your application Gemfile available on RubyGems:

gem 'oboe'

Setup
TraceView functions by sampling a subset of all requests that go through your web application. This sample rate must be set at the entry point of requests in your application. This can be a load balancer, Apache/nginx or Ruby itself. Successive hosts and software stacks that requests pass through will act appropriately according to upstream settings.

Yes. That means requests can be traced across hosts, software stacks even track internal API calls via HTTP/SOAP/REST which make for spectacular application insight. But that’s another post for another time.

For this walkthrough we’re going to assume that you’re running a Ruby on Rails application with Unicorn, Thin, Puma or any other Rack based Ruby webserver.

To instead configure Apache/nginx as the entry point, see here.

Ruby as the Entry Point
If you set up Apache or nginx as your entry point then you can skip this part entirely. The oboe gem will take it’s tracing instructions from upstream automatically.

When the oboe gem is installed in your application, it makes available Oboe::Config which is a nested hash of configuration options that affect how your application is instrumented.

Luckily, the defaults are very smart and only a couple initial values need to be configured.

The two required values are:

Oboe::Config[:tracing_mode] = 'always'
Oboe::config[:sample_rate] = 100000  # 10% of incoming requests

These values enable tracing (:tracing_mode) and sets the sample rate to 10% (:sample_rate). The sample_rate is calculated by the value out of one million. e.g. 300000 would equal a 30% sample rate meaning 3 out of 10 requests would be sampled. (For low traffic sites, you may want to set these values higher.)

These values are usually set in a Rails initializer for Ruby on Rails. See the Optional Rails Initializer section on this page. A complete list of all configuration options for Oboe::Config is here.

Getting Performance Data
And that’s it. Now to the good stuff.

If you want to test that the oboe gem is functional, start-up a Rails console, you should see a message to stdout similar to:

Tracelytics oboe gem 1.4.0.2 successfully loaded.

Note that on hosts that don’t have the system daemon installed, the oboe gem disables itself and outputs a message to that fact.

Unsupported Tracelytics environment (no libs).  Going No-op.

Deploy/restart your application and you should start seeing traces show up in your TraceView dashboard after a couple minutes.

Summary
Installation and setup of TraceView for your application is a simple two step process that can be done in 10 minutes or less. Traceview gives a unique in-depth view into requests even as they cross hosts and software stacks.

Things are moving fast for the Ruby language instrumentation in TraceView. We already support tracing of memcache-client, memcached, dalli, mongo, moped, mongoid, mongomapper, cassandra, ActiveRecord (postgres, mysql, mysql2) plus more. Most recently we added support for Rack and Resque tracing. For a full-list of supported libraries, see the top of this article.

If you haven’t tried out TraceView yet, give it a run. You won’t be disappointed.

Extras: Some Random Chart Porn
A screenshot that I sent to Linode when performance unexpectedly dropped:

image

Linode migrated my VPS to a lesser utilized host with evident results (Thanks Linode):

image

An older issue that Gameface had with atrocious rendering times:

image

Related Articles:

Ruby 2.0 Released: Let The Tracing Begin!

AppNeta Rubygems Verified

Monitoring Background Jobs in Ruby’s Resque

More Stories By Peter Giacomo Lombardo

A Rubyist and Linux addict for over a decade, Peter mainly develops in Ruby and JavaScript (as well as PHP and Perl). He is the creator of numerous software tools and applications, most recently Password Pusher, a Ruby on Rails application to communicate passwords over the web and Gameface, a social networking platform for gamers using Rails 3. When he's not creating his own applications, he helps develop and maintain the infrastructure at OurStage and manages the Ruby community for AppNeta.

@ThingsExpo Stories
DevOps is often described as a combination of technology and culture. Without both, DevOps isn't complete. However, applying the culture to outdated technology is a recipe for disaster; as response times grow and connections between teams are delayed by technology, the culture will die. A Nutanix Enterprise Cloud has many benefits that provide the needed base for a true DevOps paradigm.
SYS-CON Events announced today that Progress, a global leader in application development, has been named “Bronze Sponsor” of SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Enterprises today are rapidly adopting the cloud, while continuing to retain business-critical/sensitive data inside the firewall. This is creating two separate data silos – one inside the firewall and the other outside the firewall. Cloud ISVs ofte...
Existing Big Data solutions are mainly focused on the discovery and analysis of data. The solutions are scalable and highly available but tedious when swapping in and swapping out occurs in disarray and thrashing takes place. The resolution for thrashing through machine learning algorithms and support nomenclature is through simple techniques. Organizations that have been collecting large customer data are increasingly seeing the need to use the data for swapping in and out and thrashing occurs ...
SYS-CON Events announced today that Outscale, a global pure play Infrastructure as a Service provider and strategic partner of Dassault Systèmes, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Founded in 2010, Outscale simplifies infrastructure complexities and boosts the business agility of its customers. Outscale delivers a secure, reliable and industrial strength solution for its customers, which in...
SYS-CON Events announced today that DivvyCloud will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. DivvyCloud software enables organizations to achieve their cloud computing goals by simplifying and automating security, compliance and cost optimization of public and private cloud infrastructure. Using DivvyCloud, customers can leverage programmatic Bots to identify and remediate common cloud problems in rea...
Amazon started as an online bookseller 20 years ago. Since then, it has evolved into a technology juggernaut that has disrupted multiple markets and industries and touches many aspects of our lives. It is a relentless technology and business model innovator driving disruption throughout numerous ecosystems. Amazon’s AWS revenues alone are approaching $16B a year making it one of the largest IT companies in the world. With dominant offerings in Cloud, IoT, eCommerce, Big Data, AI, Digital Assis...
SYS-CON Events announced today that delaPlex will exhibit at SYS-CON's @CloudExpo, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. delaPlex pioneered Software Development as a Service (SDaaS), which provides scalable resources to build, test, and deploy software. It’s a fast and more reliable way to develop a new product or expand your in-house team.
In order to meet the rapidly changing demands of today’s customers, companies are continually forced to redefine their business strategies in order to meet these needs, stay relevant and continue to see profitable growth. IoT deployment and development is integral in this transformation, and today businesses are increasingly seeing the value of investing their resources into IoT deployments. These technologies are able increase ROI through projects such as connecting supply chains or enabling sm...
SYS-CON Events announced today that Cloudistics, an on-premises cloud computing company, has been named “Bronze Sponsor” of SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Cloudistics delivers a complete public cloud experience with composable on-premises infrastructures to medium and large enterprises. Its software-defined technology natively converges network, storage, compute, virtualization, and management into a ...
New competitors, disruptive technologies, and growing expectations are pushing every business to both adopt and deliver new digital services. This ‘Digital Transformation’ demands rapid delivery and continuous iteration of new competitive services via multiple channels, which in turn demands new service delivery techniques – including DevOps. In this power panel at @DevOpsSummit 20th Cloud Expo, moderated by DevOps Conference Co-Chair Andi Mann, panelists will examine how DevOps helps to meet th...
A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, whic...
Every successful software product evolves from an idea to an enterprise system. Notably, the same way is passed by the product owner's company. In his session at 20th Cloud Expo, Oleg Lola, CEO of MobiDev, will provide a generalized overview of the evolution of a software product, the product owner, the needs that arise at various stages of this process, and the value brought by a software development partner to the product owner as a response to these needs.
SYS-CON Events announced today that A&I Solutions has been named “Bronze Sponsor” of SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Founded in 1999, A&I Solutions is a leading information technology (IT) software and services provider focusing on best-in-class enterprise solutions. By partnering with industry leaders in technology, A&I assures customers high performance levels across all IT environments including: mai...
Most technology leaders, contemporary and from the hardware era, are reshaping their businesses to do software in the hope of capturing value in IoT. Although IoT is relatively new in the market, it has already gone through many promotional terms such as IoE, IoX, SDX, Edge/Fog, Mist Compute, etc. Ultimately, irrespective of the name, it is about deriving value from independent software assets participating in an ecosystem as one comprehensive solution.
SYS-CON Events announced today that EARP will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. "We are a software house, so we perfectly understand challenges that other software houses face in their projects. We can augment a team, that will work with the same standards and processes as our partners' internal teams. Our teams will deliver the same quality within the required time and budget just as our partn...
SYS-CON Events announced today that delaPlex will exhibit at SYS-CON's @ThingsExpo, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. delaPlex pioneered Software Development as a Service (SDaaS), which provides scalable resources to build, test, and deploy software. It’s a fast and more reliable way to develop a new product or expand your in-house team.
SYS-CON Events announced today that Tappest will exhibit MooseFS at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. MooseFS is a breakthrough concept in the storage industry. It allows you to secure stored data with either duplication or erasure coding using any server. The newest – 4.0 version of the software enables users to maintain the redundancy level with even 50% less hard drive space required. The software func...
In his keynote at @ThingsExpo, Chris Matthieu, Director of IoT Engineering at Citrix and co-founder and CTO of Octoblu, focused on building an IoT platform and company. He provided a behind-the-scenes look at Octoblu’s platform, business, and pivots along the way (including the Citrix acquisition of Octoblu).
SYS-CON Events announced today that Outscale will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Outscale's technology makes an automated and adaptable Cloud available to businesses, supporting them in the most complex IT projects while controlling their operational aspects. You boost your IT infrastructure's reactivity, with request responses that only take a few seconds.
SYS-CON Events announced today that Systena America will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Systena Group has been in business for various software development and verification in Japan, US, ASEAN, and China by utilizing the knowledge we gained from all types of device development for various industries including smartphones (Android/iOS), wireless communication, security technology and IoT serv...