Re: Parallel Vacuum

From: Alvaro Herrera
Subject: Re: Parallel Vacuum
Date: ,
Msg-id: 20070322151243.GH4102@alvh.no-ip.org
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In response to: Re: Parallel Vacuum  (Dimitri)
Responses: Re: Parallel Vacuum  (Dimitri)
List: pgsql-performance

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Parallel Vacuum  (Dimitri, )
 Re: Parallel Vacuum  (Alvaro Herrera, )
  Re: Parallel Vacuum  (Dimitri, )
   Re: Parallel Vacuum  (Alvaro Herrera, )
    Re: Parallel Vacuum  (Dimitri, )
     Re: Parallel Vacuum  (Alvaro Herrera, )
     Re: Parallel Vacuum  (Michael Stone, )
      Re: Parallel Vacuum  (Dimitri, )
       Re: Parallel Vacuum  (Michael Stone, )
        Re: Parallel Vacuum  (Dimitri, )
         Re: Parallel Vacuum  (Michael Stone, )

Dimitri escribió:
> On Thursday 22 March 2007 14:52, Alvaro Herrera wrote:
> > Dimitri escribió:
> > > Folks,
> > >
> > > is there any constrains/problems/etc. to run several vacuum processes in
> > > parallel while each one is 'vaccuming' one different table?
> >
> > No, no problem.  Keep in mind that if one of them takes a very long
> > time, the others will not be able to remove dead tuples that were
> > killed while the long vacuum was running -- unless you are in 8.2.
>
> Yes, I'm using the last 8.2.3 version. So, will they *really* processing in
> parallel, or will block each other step by step?

They won't block.

--
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support


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