Simon Willison’s Weblog


8 items tagged “monitoring”


The Four Golden Signals. “The four golden signals of monitoring are latency, traffic, errors, and saturation. If you can only measure four metrics of your user-facing system, focus on these four.”—from the excellent (and free) Google Site Reliability Engineering book. # 22nd June 2018, 9:23 pm


The Virtues of Monitoring. Fantastic guide to the various levels of monitoring required for a modern web application. # 13th January 2011, 4:26 am


Tracking Every Release. How Etsy use Graphite to monitor their continuous deployment releases. # 10th December 2010, 10:04 am


Announcing Kong: A server description and deployment testing tool. An ultra simple website monitoring tool written in Django which makes it easy to manage a list of Twill scripts for testing different sites. It was developed at the Lawrence Journal-World—Eric showed me a demo if this a year or so ago and I’ve been hoping they would open source it. # 18th November 2009, 12:47 pm

memcache-top. Useful self-contained perl script for interactively monitoring a group of memcached servers. # 29th October 2009, 8:32 am


Graphite. Real-time graphing package for server monitoring, similar to RRDTool. Created by the team at Orbitz, using Django and ExtJS for the frontend and Cairo to generate the graphs. # 28th June 2008, 11:53 pm

god—process and task monitoring done right. I have a long running animosity towards every process monitoring tool currently in existence; I’ll have to put this one through its paces and see if it sucks less. # 29th March 2008, 10:20 pm


Wikimedia Grid Report. Wikipedia’s Ganglia monitoring page. # 11th May 2007, 11:36 am