
Helping Rails Engineers Fix Bugs 20x Faster. Founder of #kill3pill
Belfast, Northern Ireland
Joined February 2009
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Want to build landing pages in the command line whilst keeping marketing happy?
youtube.com/shorts/vv3Y-aQvN…
Cloud costs are getting out of control. Most leaders I talk to have seen the unexpected invoice at the end of the month.
I'm building an app to allow your team to track costs on infrastructure.
Check it out: monitorcloudcosts.com
Loving the presentation from @euruko by Victor with things he's learned after 25 years. Loving the "birds aren't real" reference!
John Gallagher retweeted
🚀 It’s Day 1 of #EuRuKo2024!
Three days of inspiring talks, workshops, and connecting with the Ruby community are officially underway here in Sarajevo. Let’s make this an event to remember!
#Ruby #TechConference #TechTalk
At #EuRuKo2024 - super cool conference! I'm here and wearing a red T Shirt with "Fix Bugs 20x Faster" on it. Come and say hi and ask me what goat I have!
9:18am - "Test suite is really slow, wonder why."
9:58am - "CI tool only gives basic metrics. Sigh."
10:12am - "Let's add structured logging."
2:49pm - "First test run! Let's see..."
2:52pm - "73% of the time is from 18% of the tests... WTF?!"
John Gallagher retweeted
Ruby Warsaw Community Conference is over. Thank you to all the speakers, sponsors, and everyone involved in this event. It was a good day.👌
See you in February for the next edition!💪
#rubyonrails #conference
Just listening to @noahkagan 's amazing Million Dollar Weekend. I've just asked for 10% off on my evening meal... in a random hotel in Warsaw... feeling very foolish... and get rejected. YASSS. I'm not new to rejection challenges but this is awesome.
John Gallagher retweeted
This little calculator app allows you to explore the effect of sampling to the accuracy of:
1. Request Rates
2. Error Rates
3. Latency Percentiles
You may want to use this, if you are sampling your tracing data. @LightstepHQ @ZalandoTech
heinrichhartmann.com/samplin…
Ever been overwhelmed by observability?
"I don't know where to start!"
Here's how I've successfully instrumented real apps, step by step.
✅ 5. Improve
Maybe the data didn't show up.
Maybe the data did show, but you now realise you'd made a mistake.
Maybe you got your question answered and now you have another question.
Or improve the instrumentation.
Or choose a new question!
The Three Pillars of observability are nonsense. They're actually three data types. Let's tear down the silos. #kill3pill kill3pill.com
John Gallagher retweeted
The @o11ycast crew and @mipsytipsy have been integral in my transition from DevOps to observability.
We need to see what our code and systems are doing from the moment they are deployed, not just when they break: instant feedback. Observability is a mindset, not a tool set.
Observability - the new focus for my newsletter.
open.substack.com/pub/practi…














