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Query Plan Regression: Detecting and Fixing Bad PostgreSQL Plans
Detect query plan regressions in PostgreSQL using auto_explain, pg_hint_plan, and plan baseline management
Debezium Advanced: Handling Schema Changes, Restarts, and Offsets
Go beyond basics with Debezium — handle schema evolution, manage connector offsets, and build resilient CDC pipelines
MySQL InnoDB Locking: Deadlocks, Gap Locks, and Next-Key Locks Explained
A deep dive into InnoDB locking — record locks, gap locks, next-key locks, how READ COMMITTED eliminates gap locks, diagnosing deadlocks with SHOW ENGINE INNODB STATUS and performance_schema, and prevention patterns.
Troubleshooting MySQL Issues: Daily Queries Every DBA Should Know
Essential MySQL diagnostic queries every DBA needs. Quickly identify slow queries, lock contention, replication lag, memory issues, and connection problems.
MySQL Replication Lag: Causes, Diagnosis, and Fixes
A comprehensive guide to MySQL replication lag — why it happens, why Seconds_Behind_Master lies, how to measure accurately with pt-heartbeat, and how to fix it with multi-threaded replication and LOGICAL_CLOCK parallelism.
Top 10 MySQL Configuration Mistakes That Kill Performance
Avoid these common MySQL configuration mistakes that cripple performance. Learn proper buffer pool sizing, connection limits, and InnoDB settings for production workloads.
MySQL Error Log Table Explained: Using performance_schema for Error Analysis
MySQL 8.0 exposes error logs through performance_schema.error_log — enabling SQL-based filtering by severity, component, and timestamp without grep-ing log files.
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