Tom Lane escribió:
> Alvaro Herrera <alvhe...@commandprompt.com> writes:
> > Another weird consequence of this is that it bails out if it finds a
> > tuple larger than it can fit in one of the earlier pages; if there's
> > dead space to be compacted before that, it's not compacted.
> 
> I don't find a lot wrong with that.  The code defines its purpose as
> being to shorten the table file length.  Once it hits a page that
> can't be emptied, it cannot shorten the file any further, so why
> shouldn't it stop?

All that work, and it wasn't capable of defragging the other pages?  At
the very least it could register them in the FSM.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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