Re: reducing postgresql disk space

> alter a table column to its own type, like this:
> alter table foo alter column my_counter type integer; -- my_counter
> is already an integer

Is that really reclaim disk space and how ??
For example; if 'my_counter' column is already integer,
why do I alter this column to integer again ?

Vick Khera wrote:
>
> On Wed, May 26, 2010 at 10:16 AM, paladine <yasinmalli(at)gmail(dot)com> wrote:
>> Anyone know another method ?
>>
>
> options to reclaim disk space:
>
> vacuum full
> dump/restore (sometimes faster than vacuum full)
> cluster (not mvcc safe as far as i know)
> alter a table column to its own type, like this:
> alter table foo alter column my_counter type integer; -- my_counter
> is already an integer
>
> sometimes all you need to do is reindex the table (or just the larger
> indexes on the table selectively)
>
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