Adam Tauno Williams escribió:
> > > > I don't think such a document already exists, even rtfm_please doesn't know
> > > > about any as of now.
> > > The reason there isn't one is it doesn't need one; it's an
> > > implementation detail not a user-visible feature.
> > One reason to think it needs to be explained is that it affects how you
> > plan for VACUUM. In tables where HOT is in charge of a large part of
> > cleanup, you need to do a lot less vacuuming than you were for 8.2. In
> > that sense it is very much user-visible.
>
> Wouldn't the thresholds in the auto-vaccuming make that adjustment
> transparent?
For people that use autovacuum, yes, it would, but not everybody does.
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Alvaro Herrera http://www.CommandPrompt.com/
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