PostgreSQL Performance 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 Rogue Index Troubleshooting Tips and Tricks in PostgreSQL 17

If you have been managing PostgreSQL databases for any length of time, you have almost certainly run into the situation where an index that was supposed to help your queries is somehow making things worse. [...]

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 MVCC Fundamentals

PostgreSQL MVCC Fundamentals PostgreSQL’s Multi-Version Concurrency Control (MVCC) is the mechanism that allows readers and writers to operate without blocking each other. The trade-off is one that surprises many production teams: every UPDATE and DELETE […]

Optimizing Pagination in PostgreSQL 17

Optimizing Pagination in PostgreSQL 17: Why OFFSET/LIMIT Fails and What to Use Instead Pagination with OFFSET/LIMIT in PostgreSQL 17 is a common but often costly pattern, especially in read-heavy applications. While it appears simple to […]

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, […]

Understanding Foreign Data Wrappers in PostgreSQL

Understanding Foreign Data Wrappers in PostgreSQL: A Complete Guide to postgres_fdw In today’s distributed data landscape, organizations often need to access and integrate data from multiple database systems. PostgreSQL Foreign Data Wrappers (FDWs)provide an elegant […]

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 […]