Re: datafiles space allocation algorithm

  • From: amonte <ax.mount@xxxxxxxxx>
  • To: "Christian Antognini" <Christian.Antognini@xxxxxxxxxxxx>
  • Date: Fri, 6 Oct 2006 13:16:44 +0200

Hi

The problem is my tablespace will have over 30GB and having 8 datafiles
where one has 2gb and other 1 and other 1 and one 26gb.... doesnt seem
reasonable



On 10/6/06, Christian Antognini <Christian.Antognini@xxxxxxxxxxxx> wrote:

Niall

> This is true for the straightforward case of one table on its own in
> its own ts but is affected by factors such as
>
> other objects also growing at the same time
> files having autoextend or not - especially if there is a mix in the
> same ts
> available 'holes' in the existing datafiles
>
> and so on.

I agree with you. I was just trying to explain from where the
"round-robin" stuff comes from... No more no less.

> In general though I can't really see why, other than curiosity,
> anyone would care about where a next extent would be allocated these
> days. (just that it would be).

One more, I completely agree. Such stuffs, i.e. spreading extents over
many files, were performed loooong time ago to spread data over many
disks. Today, usually, it makes no more sense.


Cheers, Chris

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