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Re: Oracle Data Warehousing, UNIX and large file-enabled file systems

From: Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk>
Date: Mon, 25 Mar 2002 21:23:14 -0000
Message-ID: <1017091312.24426.1.nnrp-07.9e984b29@news.demon.co.uk>

Some confusion there.
If you use locally managed tablespaces, then (typically) the first 64K is allocated for the extent bitmap. Consequently if you set your filesize to be N extents plus 64K, you don't waste space, e.g. 2000MB + 64K gives you 10 x 200MB extents and a 64K bitmap.

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Jonathan Lewis
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koert54 wrote in message ...

>On the other hand - if you use uniform sized locally managed tablespaces,
>you'll lose every first extent of each datafile ... example
>a 20GB locally managed tablespace (uniform sized extent 200Mb) with 2GB
>datafiles -> 10 datafiles x 200Mb -> you lost 2GB of space for
>actual data.
Received on Mon Mar 25 2002 - 15:23:14 CST

Original text of this message

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