In-depth Database articles by Senior Java Developer Pavan Rangani — practical, production-grade tutorials and engineering deep-dives. 39 articles in this category.
August 18, 2026
Auto-increment integer or UUID for your primary key? It looks like a trivial choice made once and forgotten, but it quietly affects index performance, whether you leak your row counts, and how easily … Read more
August 18, 2026
Isolation levels are usually taught as an abstract table of names and guarantees nobody remembers. They are far clearer explained backwards — through the concrete bug each level allows, from dirty rea… Read more
August 18, 2026
Indexes are the first thing people add for performance and the last thing they audit. Which index types actually earn their place, why the column order in a composite index decides everything, and how… Read more
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
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
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
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
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
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
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
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
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
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
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
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
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
March 21, 2026
Comprehensive comparison of CockroachDB and YugabyteDB for distributed SQL workloads with performance benchmarks, architecture analysis, and selection criteria.… Read more
March 20, 2026
Detailed comparison of ClickHouse and DuckDB for analytics workloads with performance benchmarks, architecture analysis, and practical selection criteria.… Read more
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
March 9, 2026
Build database observability systems for proactive query performance management with pg_stat_statements, index analysis, and connection pool monitoring.… Read more
March 9, 2026
Deep dive into PostgreSQL 17 features covering JSON_TABLE, improved parallel queries, logical replication slots, and performance optimizations.… Read more
March 9, 2026
In-depth comparison of vector databases for AI applications: Pinecone, Weaviate, Milvus, and pgvector with benchmarks and selection criteria.… Read more
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
March 7, 2026
Implement vector databases for AI applications with embedding storage, similarity search, and retrieval-augmented generation integration.… Read more
March 5, 2026
Deploy MongoDB Atlas serverless instances with automatic scaling, consumption-based pricing, and multi-region distribution for modern applications.… Read more
March 4, 2026
Run SQLite in production with WAL mode, Litestream replication, connection pooling, and backup strategies for modern web applications.… Read more
March 3, 2026
Navigate PostgreSQL to MongoDB migration or vice versa with schema mapping strategies, data transformation patterns, and performance comparison benchmarks.… Read more
March 2, 2026
Deploy ClickHouse for production OLAP analytics with MergeTree engines, materialized views, data replication, and billion-row query optimization.… Read more
February 27, 2026
Build modern data lakehouse architecture with Apache Iceberg. Learn table format, time travel queries, schema evolution, and partition optimization.… Read more
February 26, 2026
Deploy Neo4j graph databases in production. Learn Cypher query language, graph data modeling, clustering, and performance optimization techniques.… Read more
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
February 24, 2026
Master PostgreSQL query optimization with EXPLAIN ANALYZE, indexing strategies, query planning, and real-world performance tuning techniques.… Read more
February 23, 2026
Compare vector database solutions for AI applications — pgvector, Pinecone, and Weaviate — with benchmarks, pricing, and production deployment patterns.… Read more
February 17, 2026
Redis changed its license, Valkey forked — comparing features, performance, and which to choose for new projects.… Read more
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
February 14, 2026
Hash sharding, range sharding, geo sharding — patterns for horizontal database scaling when vertical hits limits.… Read more
February 11, 2026
Compare time-series databases for IoT, monitoring, and analytics — storage efficiency, query speed, and operational costs.… Read more
February 8, 2026
Connection pooling is critical for serverless and high-traffic apps — comparing PgBouncer, PgCat, and Supavisor.… Read more
December 20, 2025
A complete system design walkthrough — WebSockets, Redis Pub/Sub, message delivery guarantees, and scaling to millions of concurrent users.… Read more