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Field notes from the on-call

Engineering deep-dives, incident retros and observability practice from the Helix team.

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(01) Featured read Editor's pick
FIELD NOTES FROM THE ON-CALL Building an incident timeline automatically from telemetry The most tedious part of any postmortem is reconstructing what happened when. Your telemetry already knows. The timeline can assemble itself while you focus on why. Arjun Mehta · Jul 12, 2026 · 2 min
Topics All posts 241 Engineering Incident retros Product Tutorials Practice Culture
All articles // 61 posts · newest first
08 Jul
FIELD NOTES FROM THE ON-CALL

Detecting slow leaks: memory, goroutines, and file handles

A leak does not page you at 3 a.m. It pages you at 3 a.m. four days from now, when the slow climb finally hits the ceiling....

Priya Raman Jul 8 2026 2 min
08 Jul
INCIDENT

What I Wish Someone Told Me Before My First On-Call Shift

Nobody warned me the hardest part wouldn't be the technical debugging. It would be trusting myself enough to act on what the...

Lena Park Jul 8 2026 3 min
06 Jul
INCIDENT

Five Minutes to Mitigate: The Anatomy of a Fast Recovery

Detection to mitigation in under five minutes isn't luck. It's the compounding result of a dozen small decisions made months...

Priya Raman Jul 6 2026 3 min
04 Jul
FIELD NOTES FROM THE ON-CALL

Metrics, logs, traces — and now, continuous profiling

Traces tell you which service was slow. Continuous profiling tells you which line of code was slow, in production, all the time...

Tomás Rivera Jul 4 2026 2 min
01 Jul
INCIDENT

Reading the Timeline Back: How We Rebuilt an Incident From Raw Traces

Our incident notes from that night were thin, written in the middle of the fire. Weeks later, we rebuilt the real timeline...

Marco Vidal Jul 1 2026 3 min
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