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Re: Query progress indication - an implementation

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Joshua Tolley <eggyknap(at)gmail(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Scara Maccai <m_lists(at)yahoo(dot)it>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Query progress indication - an implementation
Date: 2009-07-02 01:32:19
Message-ID: 200907020132.n621WJf11666@momjian.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Tom Lane wrote:
> Joshua Tolley <eggyknap(at)gmail(dot)com> writes:
> > On Mon, Jun 29, 2009 at 02:07:23PM -0400, Tom Lane wrote:
> >> I think this is pretty much nonsense --- most queries run all their plan
> >> nodes concurrently to some extent.  You can't usefully say that a query
> >> is "on" some node, nor measure progress by whether some node is "done".
> 
> > What about showing the outermost node where work has started?
> 
> That's always the outermost node; what would it tell you?

[ Repost ]

I think the only resonable solution would be to consider the estimated
cost of each node and then compute what percentage complete each node
is.

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

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

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