Re: Re: [COMMITTERS] pgsql: Fix free space map to correctly track the total amount of FSM - Mailing list pgsql-hackers

From Alvaro Herrera
Subject Re: Re: [COMMITTERS] pgsql: Fix free space map to correctly track the total amount of FSM
Date
Msg-id 20071003010753.GF19690@alvh.no-ip.org
Whole thread Raw
In response to Re: Re: [COMMITTERS] pgsql: Fix free space map to correctly track the total amount of FSM  (Decibel! <decibel@decibel.org>)
Responses Re: Re: [COMMITTERS] pgsql: Fix free space map to correctly track the total amount of FSM
List pgsql-hackers
Decibel! wrote:

> Hrm... what about adding output to vacuum verbose that indicates how many 
> pages in a relation have free space? That would allow something like 
> pgfouine to see how many FSM pages were needed. It would also make it 
> easier to identify relations that could stand a vacuum full/reindex/cluster 
> (though you'd also want to know something like average free space per 
> page).

Rather than wasting time fixing minor FSM issues, I would favor
rewriting the stuff so that the FSM is disk-spillable.

-- 
Alvaro Herrera                          Developer, http://www.PostgreSQL.org/
"Sallah, I said NO camels! That's FIVE camels; can't you count?"
(Indiana Jones)


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