Re: PostgreSQL vs. Oracle disk space usage

Hi,

From the same Database based on pgbench (TPC-B), I have noted that the
Database size is twice lager in Postgres 7.3.3 & 7.4 than with Oracle 9i.
And don't know why.
Firstly, I thought that as one column name filler type char(88), char(84) or
char(22) according the tables which were not initialized, was optimised by
Oracle to mark them as NULL and save disk space.
But, I have modified the data generation to generate random string and force
Oracle to put something in the columns. As results, the both Database was
twice bigger but Postgres Database size ~= 2 x Oracle Database size.

And I have not found any explanation.

Regards,

Thierry Missimilly

Seum-Lim Gan wrote:

> Hi,
>
> I searched through the archive and could not find any conclusive
> discussion of results on this.
>
> Has anyone compared the disk space usage between PostgreSQL
> and Oracle ?
>
> I am interested in knowing for the same tuple (i.e same
> dictionary), the disk usage between the two.
>
> Thanks.
>
> Gan
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