Database Insights

PostgreSQL 16 introduced logical replication from standbys, pg_stat_io, SQL/JSON constructors, COPY improvements, and pg_stat_checkpointer. Full DBA upgrade guide.

Configure Patroni to use Consul instead of etcd as its DCS for PostgreSQL HA. Covers Consul setup, patroni.yml, service discovery, HAProxy routing, and failover testing.

Learn how to convert a standalone PostgreSQL instance to a Patroni high-availability cluster with etcd. Step-by-step guide covering installation, configuration, and failover testing.

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

Implement the transactional outbox pattern to publish events reliably from MySQL or PostgreSQL without dual-write problems

Compare CDC, ETL, and ELT — latency, complexity, cost, and when each pattern fits your data pipeline needs

Use Kafka Connect source and sink connectors to stream data between databases, warehouses, and event systems

Understand RDS Multi-AZ for HA and Read Replicas for read scaling — failover behavior, replication lag, and costs

Configure Redis Cluster for horizontal scaling — hash slots, replication, failover, and client-side routing

Set up MySQL Orchestrator for automatic failover, topology discovery, and master election at scale

Manage MySQL binary logs safely — set retention, purge old logs, and avoid disk exhaustion in production

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.