The Spot Instance That Killed Our Payments Service (And Why It Took Us 47 Minutes to Find It)
It started at 1:49 AM. PagerDuty fired — payments-service entering CrashLoopBackOff, 3 replicas simultaneously. On-call engineer paged. I joined the i…
Testing & QA
⚑ Report a ProblemLatest Testing & QA news from Tech News
All topics
agents
ai
api
architecture
automation
aws
beginners
career
claude
cybersecurity
devchallenge
devops
discuss
frontpage
javascript
llm
machinelearning
mcp
opensource
performance
productivity
programming
python
rust
security
showdev
testing
tutorial
typescript
webdev
Risk Management for Developers: A 2026 Practitioner Guide"
At 04:09 UTC on July 19, 2024, a single CrowdStrike Falcon sensor update hit production. Within minutes, roughly 8.5 million Windows machines across a…
If You Were a Server: How to Detect Issues and Keep Things Running Smoothly
Here is a question that often pops up in senior web developer and backend interviews: "If you were a server, how would you detect that you're having i…
Database Reliability: The SRE Approach to Keeping Data Safe
The Backup That Wasn't We had backups. Daily snapshots to S3. Perfectly configured. Never tested. When we needed to restore after a data corruption in…
The Incident Commander Role: Running Incidents Without Chaos
Everyone's Debugging, Nobody's Leading Five engineers in an incident channel. All debugging independently. Nobody coordinating. Three people checking …
How to Build Systems That Don’t Collapse at Global Scale
Modern systems rarely fail because of one small bug. They fail when there’s no plan for when things inevitably go wrong. In 2026, with global teams, m…
How I Troubleshoot Kubernetes in Production
Kubernetes failures are rarely random. Most incidents repeat a small set of patterns - image pull issues, crash loops, pending pods, DNS failures, or …
Intro to tc Cloud Functors: A Graph-First Mental Model for the Modern Cloud
This is the first part of a multipart series introducing tc Cloud Functors The Monolith in the Desert Problem Sometimes I feel like the Forrest Gump o…
Public status page guide for SaaS teams selling to enterprise
Enterprise buyers treat a public status surface as a signal of operational maturity—not marketing polish. This guide covers what to publish, how to st…
Post-Mortem Best Practices That Actually Drive Change
The Post-Mortem Nobody Learns From I've sat through hundreds of post-mortems. Most follow the same pattern: something breaks, someone writes a Google …
Post-Mortem Best Practices That Actually Drive Change
The Post-Mortem Nobody Learns From I've sat through hundreds of post-mortems. Most follow the same pattern: something breaks, someone writes a Google …
Runbook Automation: From 45-Minute Fixes to 90-Second Recoveries
The Runbook Nobody Reads We had runbooks. Beautiful, detailed, Google-Docs runbooks. 47 pages long. Nobody read them at 3am. The problem isn't the doc…
Runbook Automation: From 45-Minute Fixes to 90-Second Recoveries
The Runbook Nobody Reads We had runbooks. Beautiful, detailed, Google-Docs runbooks. 47 pages long. Nobody read them at 3am. The problem isn't the doc…
What Changes and What Stays the Same for SRE with AWS Frontier Agents
On March 31, 2026, AWS made DevOps Agent and Security Agent generally available — the first two of the autonomous AI agents announced at re:Invent 202…
Why uptime and synthetic monitors still matter in the age of APM
Modern observability—think Grafana, Datadog, New Relic, and similar stacks—gives you deep insight: traces, service maps, golden signals, and often rea…
What 99.9% Uptime Actually Means: 8.7 Hours of Downtime Per Year
You've seen it everywhere. On hosting pages, SaaS pricing tables, cloud provider dashboards: "99.9% uptime guaranteed" Sounds impressive. Almost perfe…
How We Made Next.js ISR Page Cache Efficient with Redis
Next.js ISR works great on a single pod. But the moment you scale to multiple replicas — whether on Kubernetes , ECS , Cloud Foundry , or any orchestr…