Cleaning up the database

Often, a database can contain several unused objects or very old data. Cleaning up these objects helps administrators perform a backup of images more quickly. From a development point of view, unused objects are noise because they affect the refactoring process.

In database applications, you need to keep the database clean, since unused database objects might hinder quick development due to those objects' dependencies. To clean the database, you need to identify the unused database objects, including tables, views, indexes, and functions. 

Table statistics, such as the number of live rows, index scans, and sequential scans, can help identify empty and unused tables. Note that the following queries are based on statistics, ...

Get Learning PostgreSQL 11 now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.