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:
<excerpt>Yves Vindevogel wrote:
<excerpt>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.
</excerpt>
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
=:->
</excerpt>Met vriendelijke groeten,
Bien à vous,
Kind regards,
<bold>Yves Vindevogel</bold>
<bold>Implements</bold>
<smaller>
</smaller>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
<smaller>
Mail: yves.vindevogel@implements.be - Mobile: +32 (478) 80 82 91
Kempische Steenweg 206 - 3500 Hasselt - Tel-Fax: +32 (11) 43 55 76
Web: http://www.implements.be
<italic><x-tad-smaller>
First they ignore you. Then they laugh at you. Then they fight you.
Then you win.
Mahatma Ghandi.</x-tad-smaller></italic></smaller>
Mail: yves.vindevogel@implements.be - Mobile: +32 (478) 80 82 91
Kempische Steenweg 206 - 3500 Hasselt - Tel-Fax: +32 (11) 43 55 76
Web: http://www.implements.be
First they ignore you. Then they laugh at you. Then they fight you.
Then you win.
Mahatma Ghandi.