How much slower is Disk vs. RAM latency?
It takes longer to access data stored on your hard disk vs. RAM. But how big is the difference? It's really big.
Scout Blog
Stuff we think matters
CouchDB in production
John P. Wood of Signal , which offers a mobile customer engagement platform used by many top brands, recently created a couple of Scout Plugins for monitoring CouchDB . I’ve always been impressed by the team at Signal, so I was curious how they were using CouchDB in production. It ...
5 Pillars of Rails Cluster Monitoring
Photo by mollypop My how you’ve grown! A couple of years ago your little Rails app was on a single server. Now you’re on a whole cluster – you’ve got web servers, database servers, HAProxy servers, and more. I’m so proud of you! Monitoring your Rails cluster has gotten more ...
Determining free memory on Linux
Understanding free memory on Linux servers and why it is easy to misread memory usage.
MySQL Tuning Tips with Scout
If you’ve used Major Hayden’s MySQLTuner before, you know it’s a great source of MySQL optimization tips. Now you can get MySQLTuner reports automatically delivered through Scout. All you need to do is install the MySQL Stats w/MySQLTuner plugin , or update the plugin if you already have it installed. ...
Monitoring MongoDB
An overview of monitoring MongoDB with Scout, covering key metrics and setup.
Production Server Sysadmin Essentials
~ or ~ Sysadmin Eye for the Dev Guy Developers! You can churn out a Rails or Sinatra app in no time. What about putting it out there in production? Occasionally forget the syntax for crontab or...
Production Rails Tuning with Passenger: PassengerMaxProcesses
Tuning PassengerMaxProcesses for production Rails apps to balance memory and performance.
On Sinatra
Sinatra , a Ruby DSL for quickly creating web applications with minimal effort, forms a key part of the Scout infrastructure. James Gray talks about how we use Sinatra at Scout via RubyLearning.org...
The 3 pillars of our Rails Monitoring Stack
The key pillars of Rails application monitoring and how to build a monitoring practice.
Monitor MySQL queries with Scout
Robin Ward of Forumwarz has released a MySQL slow queries plugin for Scout that does exactly what you’d expect: sends an alert when a slow query is run. Derek Laptop"/> The alert contains the full query along with the query time: Alert"/> Note that you’ll need to enable slow query ...