On Fri, 2007-01-12 at 11:45, Mario Behring wrote:
> Hi all,
>
> Simple question: once I execute the delete statement, does it free
> disk space immediatelly? Does Postgres uses something like a datafile
> with a pre-defined size like Oracle does??
>
Take a look here:
http://www.postgresql.org/docs/8.2/static/routine-vacuuming.html
http://www.postgresql.org/docs/8.2/static/mvcc-intro.html
That should explain the basics of mvcc and vacuuming as applies to
pgsql.