| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Zeugswetter Andreas SB SD <ZeugswetterA(at)spardat(dot)at>, mlw <markw(at)mohawksoft(dot)com>, Nicolas Bazin <nbazin(at)ingenico(dot)com(dot)au>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Postgresql backend to perform vacuum automatically |
| Date: | 2002-03-06 17:44:29 |
| Message-ID: | 200203061744.g26HiT119508@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
Tom Lane wrote:
> "Zeugswetter Andreas SB SD" <ZeugswetterA(at)spardat(dot)at> writes:
> > I still think, that for best results the vacuums should happen continuously
> > for single pages based on a hook in wal or the buffer manager.
>
> Not possible unless you are willing to have SELECTs grab much stronger
> locks than they do now (viz, the same kind of lock that VACUUM does).
Remember, you can't recycle the page until all transactions are done
seeing it as active. I think something periodic will do the job just
fine.
--
Bruce Momjian | http://candle.pha.pa.us
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