Re: How do I know my table is bloated?

On Thu, May 30, 2013 at 3:55 PM, Igor Neyman <ineyman(at)perceptron(dot)com> wrote:

>
>
> 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.
>
> ------------------------------------------
> 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
>

I see...
I guess the only way to know is if I suspect that size of my db is growing
unexpected.
But it is good to know that a b-tree concept concept.
Because I came from a very old mysql installation (that is way postgres is
new for me) and I am trying to keep my postgres the most stable possible.