PostgreSQL DBA Archives - The Data Transformation Company

How to Do UPDATE … LIMIT in PostgreSQL (With Standard SQL Alternatives)

If you have ever migrated a workload from MySQL to PostgreSQL, you have probably hit a wall the first time you tried to run a statement like UPDATE mytable SET status = 'done' LIMIT 100;. [...]

PostgreSQL autovacuum tuning performance optimization guide

PostgreSQL Autovacuum Tuning: Internals, Configuration, and Best Practices for High-Performance Databases

PostgreSQL autovacuum tuning is essential for maintaining high-performance production databases. PostgreSQL autovacuum is one of the most critical—and most misunderstood—background processes in any database environment. When tuned correctly, autovacuum silently keeps your tables lean, your [...]

Why Your PostgreSQL Query Reads Millions of Blocks

Why Your PostgreSQL Query Reads Millions of Blocks to Return Zero Rows (And How to Fix It) A deep dive into index bloat, dead tuples, and MVCC visibility in high-throughput PostgreSQL tables If you’ve ever […]

PostgreSQL Indexing Myths

PostgreSQL Indexing Myths – Just because you’re getting an index scan in PostgreSQL, doesn’t mean you can’t do better! Understanding Index Scans: The Starting Point, Not the Destination When you see that your PostgreSQL query […]

Deep Dive: High-Throughput Bulk Loading in PostgreSQL

Deep Dive: High-Throughput Bulk Loading in PostgreSQL In high-volume data environments, the standard SQL INSERT statement is an efficiency killer. When ingesting terabytes of data(typically in high-throughput bulk loading in PostgreSQL) or migrating legacy systems, […]

UUIDv7 and Time-Based Partitioning in PostgreSQL 18

UUIDv7 and Time-Based Partitioning in PostgreSQL 18: A Complete Guide Introduction: The UUID Evolution That Changes Everything PostgreSQL 18 introduces native support for UUIDv7, a game-changing identifier format that solves one of the database world’s […]

Understanding PostgreSQL LATERAL JOINs

Understanding PostgreSQL LATERAL JOINs: A Deep Dive Introduction PostgreSQL’s LATERAL JOIN is a powerful feature that extends the capabilities of standard SQL joins. While traditional joins evaluate all rows independently, LATERAL joins allow subqueries to […]

Indexing Materialized Views in PostgreSQL

Indexing Materialized Views in PostgreSQL What are Materialized Views? Materialized views in PostgreSQL are precompiled queries that store their results physically on disk, unlike regular views, which are virtual and execute the underlying query each […]

Extracting and Substituting Text with PostgreSQL Regular Expressions

Extracting and Substituting Text with PostgreSQL Regular Expressions PostgreSQL provides a powerful built-in regex engine that enables sophisticated text manipulation through pattern matching, extraction, and substitution operations. Regular expressions are essential for data cleaning, validation, […]

PostgreSQL 18 Asynchronous I/O: Accelerating Disk Reads

PostgreSQL 18 Asynchronous I/O: Accelerating Disk Reads with Asynchronous I/O The database world is about to witness a significant leap forward with PostgreSQL 18, scheduled for release on September 25, 2025. Among the many enhancements […]