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Monitoring MongoDB Replicaset Lag with AppSignal

By Robert Beekman on Feb 12

In this post, we'll explain why we got really excited last week using Custom Metrics and Anomaly Detection to monitor MongoDB in our own infrastructure.

Introducing our Google Hangouts Chat integration

By Robert Beekman on Feb 8

Starting now, we can notify you on Google Hangouts Chat when an incident occurs.

Unraveling Classes, Instances and Metaclasses in Ruby

By Jeff Kreeftmeijer on Feb 5

Through examining metaclasses, we'll learn how class and instance methods work in Ruby.

Introducing our Asana integration

By Robert Beekman on Jan 31

Starting now, you can send your AppSignal incidents to Asana.

An instrumental intro to GraphQL with Ruby

By Peter Ohler on Jan 29

We'll learn about GraphQL by making an application about music

Serving Plug: Building an Elixir HTTP server from scratch

By Jeff Kreeftmeijer on Jan 22

It’s time for another Elixir Alchemy! We'll learn by building today. We're building an HTTP server with a Plug adapter, which parses requests and builds responses so it can run Plug apps.

Bindings and Lexical Scope in Ruby

By Jeff Kreeftmeijer on Jan 8

In this edition of Ruby Magic, we’ll show how scope works in Ruby’s methods and closures. We’ll also take a peek at how ERB uses the binding object to render templates.

Elixir package 1.9:
Improved Erlang error &
Container memory support

By Tom de Bruijn on Dec 20

We just released AppSignal for Elixir version 1.9 which improves memory host metrics reporting on containers and improves the diagnostics reports we use to debug any issue you may be having.

Ruby gem 2.8:
Container memory &
JRuby on Alpine Linux support

By Tom de Bruijn on Dec 20

We just released AppSignal for Ruby version 2.8 which improves memory host metrics reporting on containers, supports JRuby on Alpine Linux and improves the diagnostics reports we use to debug any issue you may be having.

Don't be mean: Statistical means and percentiles 101

By Robert Beekman on Dec 4

A post about the statistics we use at AppSignal and how they work.

Fibers and Enumerators in Ruby: Turning Blocks Inside Out

By Julik Tarkhanov on Nov 27

In this edition of Ruby Magic, we shine a light on Enumerable and Fiber to explain flow controlling enumerables and turning blocks inside out.

Understanding Elixir’s GenStages: Querying the Blockchain

By Miguel Palhas on Nov 13

A dive into Elixir's GenStage module and backpressure using an example querying the blockchain

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