Size of different BDB files even if they are now the same data?

I built a database of BDB (Berkeley DB) with BTREE type. And it does not appear that data, but the sequence data to the database also affects the size of the resulting file of the BDB. Is this the case?
A detailed below:
I have a set of data stored in the db. If the elements of this set is put in the db in a random order, the file that results has size SIZE1. If these elements are set in a specific order (the same order as the underlying order BTREE) db, the file resulting a. size SIZE2 While the same set is used, it is NOT equal to SIZE2 SIZE1 (SIZE1 > SIZE2).

I was wondering:
(1) if it is planned?
(2) if it is expected, will be the file in this case (data put ordered) most read effective?

Thank you.
Feng

typo
Published by: 793526 on September 8, 2010 02:02

Hello

In general, the percentage of a page that contains the application
the data will be higher if the database entries are inserted in
sorted order. The page fill factor may change the amount
disk space required to hold any particular DataSet.

You can find additional information on:

"Disk space requirements.
http://download.Oracle.com/docs/CD/E17076_01/HTML/programmer_reference/am_misc_diskspace.html

"Selection of a cache size.
http://download.Oracle.com/docs/CD/E17076_01/HTML/programmer_reference/general_am_conf.html#am_conf_cachesize

Thank you
Sandra

Tags: Database

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