Buglyst Blog
Learn to debug under pressure.
Playbooks for fast pattern recognition, guides for the full investigation, and articles for the engineering judgment around the edges.
18 playbooks · 509 guides · 96 articles · 13 linked practice labs ·skip to practice
Fast pattern recognition for the production failures engineers see most often.
18 playbooks
Debugging Env Var Issues
A concise checklist for incidents where local works but CI, staging, or production changes behavior.
Debugging Cache Stampedes
How to recognize and contain request spikes when cached data expires.
Debugging CORS Origin Bugs
A practical way to inspect origin parsing, credentials, and header behavior.
Debugging Retry Bugs
Retry issues often hide the first failure and create duplicate work.
Debugging Timezone Bugs
Time bugs usually live at day boundaries, DST changes, and unit conversions.
Debugging Pagination Bugs
Pagination bugs hide in boundary math, cursor reuse, and new records arriving between pages.
Structured investigations for the failure modes engineers meet in real systems.
Redis Cluster Failover Split-Brain: Detection and Recovery
Diagnose and resolve split-brain conditions in Redis Cluster during failover, with practical commands and configuration checks.
Debugging DynamoDB Hot Partition Throttling
A practical guide to diagnosing and fixing DynamoDB hot partition throttling, with real-world commands and strategies.
ClickHouse Slow Inserts: Too Many Parts
Diagnose and fix ClickHouse INSERT slowdowns caused by excessive data parts. Covers real causes, verification, and recovery steps.
SQLite 'database is locked' Error — Real-World Debugging
A practical guide to diagnosing and fixing SQLite's 'database is locked' (SQLITE_BUSY) error, covering concurrency, timeouts, and WAL mode.
AWS Lambda VPC Cold Start ENI Latency Debug Guide
Diagnose and fix high latency from Elastic Network Interface (ENI) attachment during AWS Lambda cold starts in a VPC.
Cassandra Tombstone Read Timeout Debugging Guide
A deep-dive into diagnosing and fixing read timeouts caused by excessive tombstones in Apache Cassandra.
Long-form thinking on debugging habits, observability, and the systems around the bug.
Five Debugging Habits That Separate Seniors from Juniors
It's not tools. It's not years of experience. It's five repeatable habits that senior engineers do reflexively and juniors haven't built yet.
Why Your Production Logs Are Lying to You
Logs tell you what the code reported. They almost never tell you what actually happened. Here is the gap, and how to close it.
The Real Cost of Console.log Debugging (and What to Use Instead)
Every engineer reaches for console.log. Most do not think about what it costs — in time, in performance, or in production readiness. Here is the honest accounting.
Interpreting Stack Traces: Practical Steps for Faster Debugging
Stack traces can be dense, but reading them fluently accelerates triage and root cause analysis. This article explains how to extract actionable information, with real-world context.
Efficient Debugging with git bisect: Going Beyond Binary Search
This article explains how to incorporate git bisect into your debugging workflow, focusing on practical execution, automation, and common edge cases.
Applying Rubber Duck Debugging to Complex Engineering Problems
Rubber duck debugging isn’t just a quirky solo exercise. I’ll show how explaining code out loud surfaces misunderstandings and reduces wasted team cycles.