Re: Massive table bloat

On Tue, Dec 11, 2012 at 8:11 AM, Michael Sawyers <msawyers(at)iii(dot)com> wrote:
> We have a table currently using 33gb worth of space for only 152mb worth of
> data because of bad processes or autovacuum not being aggressive enough. I
> was able to confirm the size difference by doing a create table as select
> along with a second test of restoring the table from the dump file to a dev
> machine.

You can use pgcompactor (http://code.google.com/p/pgtoolkit/) to
gently reduce bloat. It does not use heavy locks, processes both
tables and indexes, determines if one is bloated and tested on 8.4.

>
>
>
> There is a very large list of foreign key relationships that I'm not
> including for the sake of brevity.
>
> The database version is 8.4.1
>
> The old DBA had said that vacuum full would take days to complete, and we
> don't have that much of a window. So I was considering using the to force
> a full table rewrite. In testing on a dev machine it only took about five
> minutes.
>
> I do not have as much hands on experience with postgres so I wanted to get
> thoughts on what is considered the proper way to deal with this kind of
> situation.
>
> Any comments would be welcome.
>
>
>
>
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