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Re: HOT - preliminary results

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: Pavan Deolasee <pavan(dot)deolasee(at)enterprisedb(dot)com>, Merlin Moncure <mmoncure(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: HOT - preliminary results
Date: 2007-03-02 20:52:20
Message-ID: 200703022052.l22KqKB05033@momjian.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Simon Riggs wrote:
> On Thu, 2007-03-01 at 22:35 +0530, Pavan Deolasee wrote:
> > Merlin Moncure wrote:
> >  > On 3/1/07, Pavan Deolasee <pavan(dot)deolasee(at)enterprisedb(dot)com> wrote:
> >  >>
> >  > seems pretty solid except for one possible problem...at one point when
> >  > I dropped then later added the index on 'abalance', I got spammed
> >  > 'WARNING:  found a HOT-updated tuple' from psql prompt.
> > 
> > Thats intentional. We don't yet support CREATE INDEX on a HOT-updated
> > table. This is one of the major unfinished TODO items before we can
> > consider patch feature complete. I have left the warning to catch
> > this case till then.
> 
> CREATE INDEX and VACUUM FULL will require changes. Proposals for VACUUM
> FULL have been posted, CREATE INDEX should be there tomorrow.
> 
> CLUSTER does not need changes for HOT, as things stand currently, mainly
> because its MVCC behaviour is broken.
              ------------------------

That's oddly discouraging.  :-)

-- 
  Bruce Momjian  <bruce(at)momjian(dot)us>          http://momjian.us
  EnterpriseDB                               http://www.enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +

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Subject: Re: HOT - preliminary results
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