| From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
|---|---|
| To: | Decibel! <decibel(at)decibel(dot)org> |
| Cc: | Tatsuo Ishii <ishii(at)postgresql(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-development list <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Re: [COMMITTERS] pgsql: Fix free space map to correctly track the total amount of FSM |
| Date: | 2007-10-03 01:07:54 |
| Message-ID: | 20071003010753.GF19690@alvh.no-ip.org |
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| Lists: | pgsql-committers 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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