PostgreSQL

PostgreSQL 19 Beta 1 (June 4, 2026) brings parallel autovacuum, the native REPACK command for online table rebuilds, 2x faster inserts under foreign-key load, online logical replication without a restart, WAIT FOR LSN for read-your-writes consistency, and default changes (JIT off, lz4 TOAST, RADIUS removed). A DBA-focused walkthrough of what changed and what to test before GA.

A repeatable, top-down method for tuning PostgreSQL: measure with pg_stat_statements, read plans with EXPLAIN (ANALYZE, BUFFERS), fix queries and indexes before parameters, then tune memory, I/O, WAL, connection pooling, and autovacuum — with a ready-to-adapt postgresql.conf baseline.

Walk through PostgreSQL's multi-process architecture, shared/local memory layout, page-organized storage, MVCC tuple versioning, the WAL write path, the query execution pipeline, and physical + logical replication — all with ASCII flow diagrams that show how data and control actually move through the system.

Comprehensive PostgreSQL guide covering MVCC, extensions, partitioning, logical replication, and performance tuning. Learn why PostgreSQL powers modern applications.

PostgreSQL 13 will officially reach end of life on November 13, 2025. After this date, the PostgreSQL Global Development Group will stop releasing security patc

Use PostgreSQL range types (daterange, tstzrange) and exclusion constraints to prevent overlapping bookings and schedules. Includes room booking, multirange types, and GiST index examples.

Configure pgAudit for PostgreSQL SOC2, PCI-DSS, and HIPAA compliance. Covers session vs object auditing, log format, log volume management, and SIEM integration.

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

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

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.

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.

Use PostgreSQL CTEs and recursive queries for category trees, graph traversal, and complex aggregations. Covers MATERIALIZED vs NOT MATERIALIZED and cycle prevention.

Tune PostgreSQL 18 WAL and checkpoints without weakening crash safety: understand commit modes, measure checkpointer deltas, and validate archive recovery.

A practical guide to hardening PostgreSQL: configure SSL/TLS, tighten pg_hba.conf, implement least-privilege roles, enable row-level security, and set up audit logging.

Upgrade PostgreSQL major versions with sub-second downtime using logical replication. Step-by-step guide covering schema copy, subscription setup, lag monitoring, and sequence resync.

PostgreSQL 17 ships eager freezing and improved autovacuum prioritization, the most significant vacuum improvements in a decade. Learn how to tune autovacuum for high-write tables and prevent transaction ID wraparound.

Use pg_repack to reclaim PostgreSQL table bloat without the exclusive lock of VACUUM FULL. Covers installation, table vs index repack, disk space requirements, and throttling.

Implement least-privilege access in PostgreSQL with role hierarchies, ALTER DEFAULT PRIVILEGES, schema separation, and privilege auditing queries.

Configure PostgreSQL TLS with self-signed or CA-signed certificates. Force TLS via pg_hba.conf, set minimum TLS version, and verify server certs from clients.

PostgreSQL 17 is one of the most impactful releases in years. Incremental backups, vacuum improvements, logical replication failover slots, and planner enhancements are all production-critical changes.

Use PostgreSQL EXPLAIN and EXPLAIN ANALYZE safely, interpret estimates and runtime evidence, and test the smallest change that addresses the real bottleneck.

Use pgvector for exact and approximate similarity search, relational filters, and hybrid retrieval while measuring recall, latency, storage, and write cost.

PostgreSQL views historically executed with the owner's privileges, bypassing row-level security policies. PostgreSQL 15 fixed this with security_invoker views — here's why it matters and how to use it in multi-tenant schemas.

Learn how JusDB optimized a TimescaleDB cluster ingesting billions of IoT readings monthly, achieving 10× faster writes and 65% storage reduction.

A production guide to PostgreSQL full-text search — building tsvector generated columns, GIN indexes, multi-column search with setweight, ts_rank scoring, websearch_to_tsquery, and comparison against Elasticsearch.

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

A complete guide to PostgreSQL replication — streaming replication setup, logical replication for selective table sync, synchronous standby configuration, monitoring replication lag, and failover with Patroni.

Configure PostgreSQL logical replication for selective table sync, zero-downtime upgrades, and multi-tenant setups

PgBouncer multiplexes thousands of application connections onto a small pool of real PostgreSQL server connections — reducing connection overhead without any application code changes.