Trouble-free vacuum w/concurrent writes? (was "PostgreSQL capabilities")

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От Ed Loehr
Тема Trouble-free vacuum w/concurrent writes? (was "PostgreSQL capabilities")
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Msg-id 39352CD4.67B50DBF@austin.rr.com
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Ответ на Re: PostgreSQL capabilities  (Bruce Momjian <pgman@candle.pha.pa.us>)
Ответы Re: Trouble-free vacuum w/concurrent writes? (was "PostgreSQL capabilities")  (Charles Tassell <ctassell@isn.net>)
Список pgsql-general
Bruce Momjian wrote:
>
> > Alex Pilosov wrote:
> > >
> > > > http://networkdna.com/database/index.html mentions that PostgreSQL is
> > > > capable of "Online backup". What does that exactly mean?
> > >
> > > It means Postgres can do a reliable backup (a consistent snapshot) of a
> > > database without shutting down the database.
> >
> > Hmmm.  My backup procedure, based on earlier discussions in this group,
> > involves blocking all write-access during a pg_dump.  That is effectively
> > shutting down the database from my perspective.  Is there a quicker way
> > to take a consistent snapshot while still allowing writes?
>
> With 6.5 and 7.0, pg_dump grabs a consistent snapshot of the database at
> the time it starts, and dumps that.  No reason to shut out users.

Can other folks confirm that this is no longer a problem?  Are people
successfully vacuuming while allowing full read/write access to the db?

Regards,
Ed Loehr

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