On Mon, Mar 13, 2006 at 09:19:32 -0800,
  "Craig A. James" <[EMAIL PROTECTED]> wrote:
> Alvaro Herrera wrote:
> >>If I only insert data into a table, never update or delete, then I should 
> >>never have to vacuum it.  Is that correct?
> >
> >You still need to vacuum eventually, to avoid transaction Id wraparound
> >issues.  But not as often.
> 
> Thanks.  Any suggestions for what "not as often" means?  For example, if my 
> database will never contain more than 10 million rows, is that a problem?  
> 100 million rows?  When does transaction ID wraparound become a problem?

I believe it is at billion (10^9).

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