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📰 Dev.to · Kyryl

5 articles · Updated every 3 hours · View all reads

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🔁 One Health Check Turned a 10-Minute Outage Into 40

Dev.to · Kyryl ⚡ AI Lesson 4d ago

🔁 One Health Check Turned a 10-Minute Outage Into 40

Wiring your liveness and readiness probes to the same deep health check is a category error. When a dependency drops, Kubernetes restart-loops a fleet of perfec

🔒 CREATE INDEX Is a Write Outage in Disguise

Dev.to · Kyryl ⚡ AI Lesson 4d ago

🔒 CREATE INDEX Is a Write Outage in Disguise

A plain CREATE INDEX takes a SHARE lock and blocks every write to the table for the whole build. On a busy production table that is a multi-minute outage. Here

🧱 Your Test Fixtures Are Lying About What Matters

Dev.to · Kyryl 1w ago

🧱 Your Test Fixtures Are Lying About What Matters

Fixture constructors bury the one field a test actually cares about under thirty irrelevant ones. Builders fix the signal-to-noise problem, at a real cost.

🧹 Your Spring Service Does Not Need That Interface

Dev.to · Kyryl ⚡ AI Lesson 2w ago

🧹 Your Spring Service Does Not Need That Interface

The one-interface-one-impl pattern in Spring exists because of a framework constraint that disappeared around Spring Boot 2.0. Here is why most service interfac

💀 Your Spring Boot Controllers Are 80% Swagger Noise - Here's the Fix

Dev.to · Kyryl 🔧 Backend Engineering ⚡ AI Lesson 3w ago

💀 Your Spring Boot Controllers Are 80% Swagger Noise - Here's the Fix

I never gave much thought to where Swagger annotations lived. Wire up springdoc, scatter @Operation...