Re: Vacuum and Transactions

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: "'pgsql-general(at)postgresql(dot)org'" <pgsql-general(at)postgresql(dot)org>
Subject: Re: Vacuum and Transactions
Date: 2001-07-06 18:49:37
Message-ID: 200107061849.f66Inbw09583@candle.pha.pa.us
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> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> >> In 7.2, VACUUM will not require an exclusive lock.
>
> > Care to elaborate on that? How are you going to do it?
>
> Uh, have you not been paying attention to pg-hackers for the
> last two months?
>
> I am assuming here that concurrent VACUUM will become the default
> kind of vacuum, and the old style will be invoked by some other
> syntax (VACUUM FULL ..., maybe).

By concurrent vacuum, do you mean the auto-vacuum you are doing? I
realize that will not need a lock. Are you changing default VACUUM so
it only moves rows inside existing blocks too?

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