How to Actually Read a Postgres Query Plan
July 23, 2026
EXPLAIN ANALYZE output looks like a wall of numbers. Only four of them matter, it reads inside out, and the gap between estimated and actual rows finds most bad plans on its own.… Read more
Database
In-depth Database articles by Senior Java Developer Pavan Rangani — practical, production-grade tutorials and engineering deep-dives. 41 articles in this category.
Zero-Downtime PostgreSQL Schema Migrations with Expand and Contract
July 17, 2026
One ALTER TABLE can take an ACCESS EXCLUSIVE lock and stall every query behind it. Learn the expand-contract migration pattern, lock_timeout guards, chunked backfills, CONCURRENTLY index builds, and w… Read more
PostgreSQL Connection Pooling: PgBouncer vs PgCat vs Supavisor
June 12, 2026
A practical comparison of PgBouncer, PgCat, and Supavisor: pooling modes, prepared-statement support, load balancing, sizing math, and the pitfalls that bite teams in production.… Read more
PostgreSQL 18 Asynchronous I/O for High-Throughput Workloads
May 9, 2026
A practitioner deep-dive into PostgreSQL 18 asynchronous I/O: io_method tuning, io_uring requirements, sequential scan throughput gains, and real pgbench numbers compared to PG17.… Read more
Qdrant Vector Database Production Deployment Guide
May 8, 2026
A field-tested guide to running Qdrant at scale: distributed mode with raft, scalar and binary quantization, payload indexing, hybrid search with sparse vectors, and the Kubernetes operator setup we s… Read more
DuckDB for Analytics: Embedded OLAP Database for Modern Data Workloads
April 7, 2026
Complete guide to using DuckDB for analytical workloads. Covers Parquet file processing, window functions, Python and Java integration, and embedding in applications.… Read more
PostgreSQL 17 Logical Replication: Advanced Patterns for Multi-Region Deployments
April 6, 2026
Deep dive into PostgreSQL 17 logical replication patterns for multi-region database deployments including conflict resolution, failover, and monitoring strategies.… Read more
Redis 8 Streams and Time Series: Building Real-Time Data Pipelines
March 26, 2026
Complete guide to Redis 8 streams and time series — consumer groups, windowed aggregations, real-time analytics, and production pipeline patterns.… Read more
Apache Kafka Connect with Debezium CDC: Real-Time Data Streaming Pipeline
March 26, 2026
Production guide to building CDC streaming pipelines with Kafka Connect and Debezium covering connector configuration, SMTs, schema evolution, and monitoring.… Read more
SQLite with Litestream Replication for Production Applications
March 26, 2026
A practical guide to running SQLite in production with Litestream for continuous replication to S3, disaster recovery, and scaling strategies.… Read more
TimescaleDB for IoT: Building High-Performance Time Series Data Pipelines
March 25, 2026
Complete guide to building IoT time series data pipelines with TimescaleDB covering hypertables, data compression, continuous aggregates, and real-time analytics.… Read more
Graph Databases with Neo4j: Building Knowledge Graphs for AI Applications
March 23, 2026
Complete guide to building knowledge graphs with Neo4j for AI applications including relationship modeling, Cypher queries, LLM integration, and recommendation engines.… Read more
PostgreSQL Partitioning Strategies: Managing Billion-Row Tables in Production
March 22, 2026
Complete guide to PostgreSQL table partitioning including range, list, and hash strategies with partition pruning optimization, maintenance automation, and migration patterns.… Read more
CockroachDB vs YugabyteDB: Choosing the Right Distributed SQL Database
March 21, 2026
Comprehensive comparison of CockroachDB and YugabyteDB for distributed SQL workloads with performance benchmarks, architecture analysis, and selection criteria.… Read more
ClickHouse vs DuckDB for Analytics: Choosing the Right OLAP Engine
March 20, 2026
Detailed comparison of ClickHouse and DuckDB for analytics workloads with performance benchmarks, architecture analysis, and practical selection criteria.… Read more
PostgreSQL 18: New Features, Performance Improvements, and Migration Guide
March 16, 2026
Complete guide to PostgreSQL 18 — async I/O, virtual generated columns, JSON improvements, performance gains, and migration path from PostgreSQL 17.… Read more
Vector Database Comparison: Pinecone vs Weaviate vs Milvus for AI Applications
March 10, 2026
In-depth comparison of vector databases Pinecone, Weaviate, and Milvus covering architecture, performance benchmarks, pricing, and production deployment for AI applications.… Read more
Database Observability and Query Performance: Guide 2026
March 9, 2026
Build database observability systems for proactive query performance management with pg_stat_statements, index analysis, and connection pool monitoring.… Read more
PostgreSQL 17 Features and Performance Guide 2026
March 9, 2026
Deep dive into PostgreSQL 17 features covering JSON_TABLE, improved parallel queries, logical replication slots, and performance optimizations.… Read more
Vector Databases Compared: Pinecone vs Weaviate vs Milvus 2026
March 9, 2026
In-depth comparison of vector databases for AI applications: Pinecone, Weaviate, Milvus, and pgvector with benchmarks and selection criteria.… Read more
Data Lakehouse Architecture: Complete Guide 2026
March 8, 2026
Build data lakehouse architecture combining the flexibility of data lakes with the performance of data warehouses using open table formats.… Read more
Vector Database for AI Applications: Guide 2026
March 7, 2026
Implement vector databases for AI applications with embedding storage, similarity search, and retrieval-augmented generation integration.… Read more
PostgreSQL 17 New Features: Complete Guide 2026
March 6, 2026
Master PostgreSQL 17 new features with incremental backups, enhanced JSON support, improved vacuum performance, and logical replication upgrades.… Read more
MongoDB Atlas Serverless: Database Guide for 2026
March 5, 2026
Deploy MongoDB Atlas serverless instances with automatic scaling, consumption-based pricing, and multi-region distribution for modern applications.… Read more
SQLite in Production: Modern Applications Guide 2026
March 4, 2026
Run SQLite in production with WAL mode, Litestream replication, connection pooling, and backup strategies for modern web applications.… Read more
PostgreSQL vs MongoDB: Migration and Comparison Guide 2026
March 3, 2026
Navigate PostgreSQL to MongoDB migration or vice versa with schema mapping strategies, data transformation patterns, and performance comparison benchmarks.… Read more
ClickHouse OLAP Analytics Production Guide
March 2, 2026
Deploy ClickHouse for production OLAP analytics with MergeTree engines, materialized views, data replication, and billion-row query optimization.… Read more
DuckDB Analytics Embedded Database Guide
March 1, 2026
Perform high-performance analytics with DuckDB embedded database using columnar storage, Parquet integration, and Python/Node.js bindings.… Read more
CockroachDB Distributed SQL Production Guide
February 28, 2026
Deploy CockroachDB in production with multi-region replication, serializable isolation, and automatic survivability configurations.… Read more
Apache Iceberg: Building Modern Data Lakehouse Architecture
February 27, 2026
Build modern data lakehouse architecture with Apache Iceberg. Learn table format, time travel queries, schema evolution, and partition optimization.… Read more
Graph Databases Neo4j: Production Implementation Guide for 2026
February 26, 2026
Deploy Neo4j graph databases in production. Learn Cypher query language, graph data modeling, clustering, and performance optimization techniques.… Read more
Vector Databases Powering AI: Global Data Infrastructure Revolution
February 25, 2026
Discover how vector databases are powering AI applications globally, enabling semantic search, RAG systems, and intelligent data retrieval at scale.… Read more
SQL Query Optimization PostgreSQL: Performance Tuning with EXPLAIN ANALYZE
February 24, 2026
Master PostgreSQL query optimization with EXPLAIN ANALYZE, indexing strategies, query planning, and real-world performance tuning techniques.… Read more
Vector Databases for AI: pgvector vs Pinecone vs Weaviate Comparison 2026
February 23, 2026
Compare vector database solutions for AI applications — pgvector, Pinecone, and Weaviate — with benchmarks, pricing, and production deployment patterns.… Read more
PostgreSQL 17: JSON Path, Incremental Backup, and Performance Improvements
February 20, 2026
PostgreSQL 17 brings JSON path queries, incremental backup, partition pruning improvements, and merge command enhancements.… Read more
Redis 8 vs Valkey: The Fork That Split the Caching World
February 17, 2026
Redis changed its license, Valkey forked — comparing features, performance, and which to choose for new projects.… Read more
PostgreSQL 17: Why It Is the Default Database Choice for 2026
February 16, 2026
PostgreSQL 17 cements its dominance with JSON_TABLE, incremental backups, 30% faster bulk inserts, and pgvector for AI embeddings — one database to rule them all.… Read more
Database Sharding Strategies: When and How to Scale Horizontally
February 14, 2026
Hash sharding, range sharding, geo sharding — patterns for horizontal database scaling when vertical hits limits.… Read more
Time-Series Data at Scale: TimescaleDB vs ClickHouse vs InfluxDB
February 11, 2026
Compare time-series databases for IoT, monitoring, and analytics — storage efficiency, query speed, and operational costs.… Read more
Database Connection Pooling: PgBouncer, PgCat, and Supavisor Compared
February 8, 2026
Connection pooling is critical for serverless and high-traffic apps — comparing PgBouncer, PgCat, and Supavisor.… Read more
System Design: Building a Real-Time Chat Application
December 20, 2025
A complete system design walkthrough — WebSockets, Redis Pub/Sub, message delivery guarantees, and scaling to millions of concurrent users.… Read more