Re: How do I know my table is bloated?

From: Rodrigo Barboza [mailto:rodrigombufrj(at)gmail(dot)com]
Sent: Thursday, May 30, 2013 2:50 PM
To: Igor Neyman
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: [ADMIN] How do I know my table is bloated?

Well, maybe I am. 
But I am worried because I know that there are some tables that do lots of updates and delete.
As this concept is new for me, I am trying to be prepared to detect a situation like this.

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It all depends on pattern of your inserts/updates/deletes.
If your index accumulates lots of almost (but not completely) empty pages with just few entries left, than - yes, REINDEX "is your friend".

b.t.w., this concept is not unique to Postgres, it's just a nature of B-tree indexes.

Igor