The JusDB Database Engineering Blog

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.

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

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

Use TimescaleDB for time-series data in PostgreSQL. Covers hypertable creation, continuous aggregates with refresh policies, retention policies, and 10-20x compression.

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 auto_explain to automatically log EXPLAIN output for slow PostgreSQL queries. Covers log_analyze, log_buffers, sample_rate, JSON format, and RDS setup.

Use hypopg to test how a new PostgreSQL index would affect query plans before building it. Includes install, hypothetical index creation, EXPLAIN workflow, and index sizing.

Master PostgreSQL window functions: ROW_NUMBER, RANK, SUM OVER, LAG/LEAD, moving averages, and frame clauses. Real SQL examples for analytics and reporting queries.