The JusDB Database Engineering Blog

Implement schema change management with versioning, peer review, and automated validation for safe deployments

Patroni automates PostgreSQL failover using a distributed consensus store like etcd. Learn how to configure Patroni for production-grade HA.

Build a data-driven capacity planning process using historical metrics, growth trends, and resource modeling

Build a production-grade PostgreSQL HA stack using Patroni for failover and HAProxy for connection routing

Monitor PostgreSQL streaming replication lag, replication slots, and standby health to ensure HA readiness

RTO and RPO drive backup decisions. This guide covers mysqldump, XtraBackup, pgBackRest, WAL archiving, S3 object lock, and the 3-2-1-1-0 backup rule.

Monitor MySQL and PostgreSQL with Prometheus, Grafana, and PMM. Covers mysqld_exporter, postgres_exporter, alert rules, and production dashboard configuration.

Secure your MySQL and PostgreSQL databases — TLS, at-rest encryption, role-based access, and audit logging

Running a single PMM server is a single point of failure for your database monitoring. Here's how to set up PMM in an HA configuration with failover and shared storage.

Essential MySQL diagnostic queries every DBA needs. Quickly identify slow queries, lock contention, replication lag, memory issues, and connection problems.

A comprehensive guide to MySQL replication lag — why it happens, why Seconds_Behind_Master lies, how to measure accurately with pt-heartbeat, and how to fix it with multi-threaded replication and LOGICAL_CLOCK parallelism.

Deploy PMM to get deep MySQL and PostgreSQL visibility — query analytics, dashboards, and alerting in one tool