Re: Question about Performance of my db design

Gustavo wrote:
>
>
> Hi
>
> I have a question about the performance of my db design . I have
> this situation:
>
> - One schema base containing 20 tables whit data of all users of
> my system. (These tables will contain a lot of rows (millions)).
> The data of each user is
> independent of the rest
> - One schema per user with a view of the schema base
> containing only the data of this user.
>

If there is only one user per schema, you don't need to make views to
separate users.

>
> It is a good design? how efficient Does Postgree manage these big
> views?
>
>
A view is nothing more than a SQL query made to look like a table. You
will need to read about views in the documentation, I think.

> In the other hand, i have another idea:
>
> - One schema whith the 20 tables and one schema per user whith
> tables that make inheritance of these.
>
>
You will probably need to read a bit about inheritance. You could use
inheritance as well, yes. However, I would do it within one schema.

> If i do that, i avoid to make views.
>
> What design is the best?
>

Your question was answered in general here:

http://archives.postgresql.org/pgsql-novice/2007-02/msg00094.php

Basically, you need to decide what suits your needs best. If
performance is critical (limiting), then you will need to test to see
which is the best solution.

Sean