Database Insights

Compare CockroachDB, Google Spanner, and YugabyteDB — consistency models, PostgreSQL compatibility, and operational costs

How to use pg_stat_statements to identify slow queries, analyze execution stats, and optimize PostgreSQL performance

MySQL 8.0 introduced multi-valued indexes — allowing you to index individual elements of a JSON array so queries using MEMBER OF or JSON_OVERLAPS can use an index.

A production guide to zero-downtime database migrations — why ALTER TABLE causes downtime, the Expand-Contract pattern, safe migration patterns for PostgreSQL and MySQL, and tooling with Flyway, Liquibase, pt-osc, and gh-ost.

Master MongoDB aggregation pipeline stages — $lookup, $group, $facet, explain plans, and index optimization

Decode PostgreSQL wait events to diagnose lock contention, I/O bottlenecks, and CPU pressure in production

Add data quality checks to your pipeline — row count validation, schema drift detection, and anomaly alerting with Great Expectations

UUIDs as primary keys can destroy database performance. Learn why 50M rows went from 0.5ms to 2.3ms inserts, and how to fix it with hybrid approaches.

Detect query plan regressions in PostgreSQL using auto_explain, pg_hint_plan, and plan baseline management

AWS RDS, Aurora, and Aurora Serverless v2 all run MySQL and PostgreSQL — but their pricing models differ dramatically. Learn when to use each and how to avoid expensive I/O surprises.

Deploy Vitess for horizontal MySQL sharding — VSchema design, vtgate routing, and migration from single-instance MySQL

Compare streaming and batch data processing — latency, throughput, tooling, and when each approach makes sense