Brain Dumps

Boeing 707 Emergency Checklist (1969) The Utilization Saturation and Errors (USE) Method is a methodology for analyzing the performance of any system. It directs the construction of a checklist, which for server analysis can be used for quickly identifying resource bottlenecks or errors. It begins by posing questions, and then seeks answers, instead of beginning with given metrics (partial answers) and trying to work backwards. The resulting USE Method-derived checklists for different operating systems are listed on the left navigation panel ( Linux ,   Solaris , etc). You can customize these for your environment, adding additional tools that your site uses. There is also the   Rosetta Stone of Performance Checklists , automatically generated from some of these. Performance monitoring products can make the USE method easier to follow by providing its metrics via an easy-to-use interface. Intro A serious performance issue arises, and you suspect it's caused by the s...

Written by Rob Ewaschuk Edited by Betsy Beyer Google’s SRE teams have some basic principles and best practices for building successful monitoring and alerting systems. This chapter offers guidelines for what issues should interrupt a human via a page, and how to deal with issues that aren’t serious enough to trigger a page. Definitions There’s no uniformly shared vocabulary for discussing all topics related to monitoring. Even within Google, usage of the following terms varies, but the most common interpretations are listed here. Monitoring Collecting, processing, aggregating, and displaying real-time quantitative data about a system, such as query counts and types, error counts and types, processing times, and server lifetimes. White-box monitoring Monitoring based on metrics exposed by the internals of the system, including logs, interfaces like the Java Virtual Machine Profiling Interface, or an HTTP handler that emits internal statistics. Black-box monitoring ...