Debugging & Troubleshooting Guides

Field manuals for the systems that break at 3am — debugging commands, health checks, and operational procedures for databases and Kubernetes.

Elasticsearch

Cluster health monitoring, shard allocation debugging, and index management

PostgreSQL

Query performance analysis, connection troubleshooting, and replication monitoring

MongoDB

Replica sets management, performance tuning, and comprehensive diagnostics

Kubernetes

Pod debugging, service networking, deployments, and cluster troubleshooting

Redis

Memory analysis, latency spikes, persistence failures, and replication debugging

Kafka

Consumer lag, under-replicated partitions, rebalance storms, and broker health

NGINX

5xx triage, reverse proxy pitfalls, TLS debugging, and performance limits

Replace placeholder values like <YOUR_PASSWORD> and <DATABASE_NAME> with your own configuration. Never commit real credentials — use placeholders and environment variables.