No, but is more common Insert and Update than delete.
While I have around 50.000 Insert and Update, in delete is 5.000
2008/6/30 Alvaro Herrera <alvherre(at)commandprompt(dot)com>:
> Rafael Domiciano escribió:
> > I have schedelus to run vacuum at the night, it starts at 01:00 AM
>
> Do you execute lots of updates or deletes on some tables?
>
> --
> Alvaro Herrera
> http://www.CommandPrompt.com/
> PostgreSQL Replication, Consulting, Custom Development, 24x7 support
>