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Re: next extent query

From: Niall Litchfield <niall.litchfield_at_dial.pipex.com>
Date: Mon, 16 Jun 2003 21:57:16 +0100
Message-ID: <3eee2ed6$0$11380$cc9e4d1f@news.dial.pipex.com>


"Arcangelo" <xxx_at_yyy.com> wrote in message news:3eee2847$0$24424$afc38c87_at_news.optusnet.com.au...
> (B) The next extent will be the same size as your last one (so check out
> BYTES in dba_extents), unless you happen to be on one of the autoallocate
> boundaries. The barebones autoallocate algorithm goes: first 16 extents
will
> be 64K, then to extent #79 will be 1M, then to extent #199 will be 8M,
> thereafter 64M. So unless you have 15, 79 or 199 extents, your next extent
> will be the same as the last one. However, the algorithm gets more
> complicated if you specify an INITIAL at the time of table creation, and
if
> that's the case, see answer (A) above.

I'm still not entirely convinced that the above is true - since with objects growing at different rates it could lead to 'unable to allocate extent' when Oracle could by choosing a different size from the available list. I feel a test coming on. (but not after 4 beers that would be silly - thats the time for theorizing)

-- 
Niall Litchfield
Oracle DBA
Audit Commission UK
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Received on Mon Jun 16 2003 - 15:57:16 CDT

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