Re: Another question on indexes (drop and recreate)

I only add records, and most of the values are "random"
Except the columns for dates, ....

On 21 Jun 2005, at 17:49, John A Meinel wrote:

> Yves Vindevogel wrote:
>
>> And, after let's say a week, would that index still be optimal or
>> would it be a good idea to drop it in the weekend and recreate it.
>
>
> It depends a little bit on the postgres version you are using. If you
> are only ever adding to the table, and you are not updating it or
> deleting from it, I think the index is always optimal.
> Once you start deleting from it there are a few cases where older
> versions would not properly re-use the empty entries, requiring a
> REINDEX. (Deleting low numbers and always adding high numbers was one
> of
> the cases)
>
> However, I believe that as long as you vacuum often enough, so that the
> system knows where the unused entries are, you don't ever have to drop
> and re-create the index.
>
> John
> =:->
>
>
Met vriendelijke groeten,
Bien à vous,
Kind regards,

Yves Vindevogel
Implements