PostgreSQL Maintenance 基础 for Stable Production

Mon, 22 Jun 2026 15:00:00 +0900

When running PostgreSQL in production, performance can degrade and transactions can bloat without you noticing. This article covers the maintenance fundamentals you need to keep PostgreSQL running smoothly.

1. VACUUM: Cleaning Up Dead Tuples

PostgreSQL uses MVCC (Multi-Version Concurrency Control), which means old row versions (dead tuples) linger in tables after updates and deletes. Left unchecked, tables bloat and performance suffers.

-- Run a standard VACUUM (does not block other operations)
VACUUM;

-- Reclaim space to the OS (acquires table lock)
VACUUM FULL;

Production environments have autovacuum enabled by default, but busy tables may need tuned settings:

PostgreSQL Performance Tuning for 网络 Developers

Mon, 20 Apr 2026 12:00:00 +0900

Optimize slow-performing applications by profiling database queries in PostgreSQL with EXPLAIN. Slow queries are the single largest bottleneck in most web applications. This guide walks you through essential index optimization guidelines, how to read execution plans, and key configuration parameter adjustments for self-hosted or managed databases.

1. Designing Effective Indexes

The primary bottleneck in modern databases is Disk I/O (reading block files from storage). Adding indexes allows PostgreSQL to query data records directly instead of scanning the entire table.

Database on Kaisekukun

PostgreSQL Maintenance 基础 for Stable Production

1. VACUUM: Cleaning Up Dead Tuples

PostgreSQL Performance Tuning for 网络 Developers

1. Designing Effective Indexes