n0derunner

    [Guest Post] Why I became a performance engineer

    Published: (Updated: ) in Miscellaneous by . Leave a Comment on [Guest Post] Why I became a performance engineer.

    First Off, I want to thank Gary for giving me an opportunity to be a guest writer on his blog, it’s an honor.  My name is Dan Chilton and I have worked in technology for the past 20 years.  As an introduction, today I just want to tell the story of why I became a […]

    Cross rack network latency in AWS

    Published: (Updated: ) in Miscellaneous, , by . 1 Comment on Cross rack network latency in AWS.

    I have VMs running on bare-metal instances. Each bare-metal instance is in a separate rack by design (for fault tolerance). The bandwidth is 25GbE however, the response time between the hosts is so high that I need multiple streams to consume that bandwidth. Compared to my local on-prem lab I need many more streams to […]

    Quick & Dirty Prometheus on OS-X

    Published: (Updated: ) in Miscellaneous, , by .

    How to install Prometheus on OS-X Install prometheus $ cd /Users/gary.little/Downloads/prometheus-2.16.0-rc.0.darwin-amd64$ ./prometheus Add a collector/scraper to monitor the OS Prometheus itself does not do much apart from monitor itself, to do anything useful we have to add a scraper/exporter module. The easiest thing to do is add the scraper to monitor OS-X itself. As in […]

    Meltdown, speculative execution and side-channels explainer.

    Published: (Updated: ) in Miscellaneous by .

    There are a lot of explanations for the current Meltdown/Spectre crisis but many did not do a good job of explaining the core issue if how information is leaked from the secret side,  to the attackers side.  This is my attempt to explain it (mostly to myself to make sure I got it right). What […]

    Simple statistics for performance analysts.

    Published: (Updated: ) in Miscellaneous by .

    As performance analysts we often have to summarize large amounts of data in order to make engineering decisions or understand existing behavior.  This paper will help you do exactly that!  Many analysts know that using statistics can help, but statistical analysis is a huge field in itself and has its own complexity.  The article below […]

    Code Red – The healthcare.gov story.

    Published: (Updated: ) in Miscellaneous by .

    A downtime classic, for several months in 2013 the troubles of a very particular website were front page news across the US.  Full Story from Time Magazine (PDF) https://blog.newrelic.com/2014/03/26/depth-look-team-saved-healthcare-gov/