www/content/blog/miscellaneous/debug-disk-usage-postgresql.md

---
title: "Investigate PostgreSQL disk usage"
date: 2015-11-24
description: A simple how to
tags:
  - PostgreSQL
---

## How to debug disk occupation in postgresql

- get a database oid number from `ncdu` in `/var/lib/postgresql`
- reconcile oid number and db name with : `select oid,datname from pg_database where oid=18595;`
- Then in database : `select table_name,pg_relation_size(quote_ident(table_name)) from information_schema.tables where table_schema = 'public' order by 2;`
Long overdue first commit with content 2020-04-28 17:29:52 +02:00			`---`
Tags overhaul to improve search results, and some light rewording or reformating 2021-09-13 00:48:07 +02:00			`title: "Investigate PostgreSQL disk usage"`
Long overdue first commit with content 2020-04-28 17:29:52 +02:00			`date: 2015-11-24`
Tags overhaul to improve search results, and some light rewording or reformating 2021-09-13 00:48:07 +02:00			`description: A simple how to`
Some more articles reformatting 2021-03-11 23:15:31 +01:00			`tags:`
			`- PostgreSQL`
Long overdue first commit with content 2020-04-28 17:29:52 +02:00			`---`

			`## How to debug disk occupation in postgresql`

			- get a database oid number from `ncdu` in `/var/lib/postgresql`
			- reconcile oid number and db name with : `select oid,datname from pg_database where oid=18595;`
			- Then in database : `select table_name,pg_relation_size(quote_ident(table_name)) from information_schema.tables where table_schema = 'public' order by 2;`