The JusDB Database Engineering Blog

Understand how PostgreSQL TOAST stores large columns, diagnose TOAST bloat with SQL, choose the right storage strategy, and use LZ4 compression in PG14+.

Migrate from MySQL to PostgreSQL using pgLoader. Covers schema differences, type casting, application code changes, validation, and zero-downtime migration strategies.

Learn how to use pgBadger to analyze PostgreSQL logs, find slow queries, and automate daily reporting. Includes postgresql.conf setup, cron automation, and RDS tips.

Set up PostgreSQL monitoring with Prometheus and postgres_exporter. Includes install steps, critical alert rules, Grafana dashboard panels, and custom query metrics.

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

Use PostgreSQL tablespaces to distribute tables and indexes across NVMe, SSD, and archive storage. Covers creation, ALTER TABLE SET TABLESPACE, monitoring, and backup.

Run PostgreSQL schema changes without locking: CREATE INDEX CONCURRENTLY, NOT VALID constraints, expand-contract column type changes, and lock_timeout. Covers pg_repack for table rewrites.

Migrate Oracle to PostgreSQL using ora2pg. Covers NUMBER→NUMERIC, DATE gotchas, PL/SQL→PL/pgSQL conversion, sequences, DUAL, NULL handling, and validation steps.

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.

Use pg_cron to schedule SQL jobs inside PostgreSQL. Covers installation, cron syntax, partition maintenance, materialized view refresh, job monitoring, and RDS setup.

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.

Design multi-tenant databases — compare schema-per-tenant, row-level-security, and database-per-tenant approaches