The JusDB Database Engineering Blog

Build a real-time analytics pipeline from PostgreSQL to ClickHouse using CDC — architecture, latency, and schema mapping

Use Aurora Serverless v2 for cost-effective scaling — ACU configuration, scaling behavior, and when it fits

Configure pgBackRest for full, differential, and WAL archiving backups with S3 storage and point-in-time recovery

Measure PostgreSQL table and index bloat, then use pg_repack to reclaim space with zero downtime

Fine-tune PostgreSQL autovacuum to eliminate dead tuples, prevent table bloat, and maintain query performance

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

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

2025 was the year databases competed on operational simplicity. Serverless databases matured, pgvector merged vector search into PostgreSQL, and CDC became standard infrastructure. Here's what mattered and what's next.

PostgreSQL WAL retention is a balancing act — too little and standbys fall behind; too much and you risk disk exhaustion. Here's how to configure wal_keep_size and manage replication slots safely.

Five counterintuitive database performance truths every engineer gets wrong — over-indexing costs, N+1 queries, connection pool sizing, replica reads, and EXPLAIN limitations.

Teams take down production for hours with migrations that could be zero-downtime operations. Learn to use gh-ost and CREATE INDEX CONCURRENTLY, implement rollback plans, and apply the expand-contract pattern for breaking changes.

Survey essential PostgreSQL extensions: pg_stat_statements for query analysis, pg_trgm for fuzzy search, pg_cron for scheduled jobs, pg_buffercache for cache inspection.