Re: I: About "Our CLUSTER implementation is pessimal" patch

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
Cc: Itagaki Takahiro <itagaki(dot)takahiro(at)gmail(dot)com>, Josh Kupershmidt <schmiddy(at)gmail(dot)com>, Leonardo Francalanci <m_lists(at)yahoo(dot)it>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: I: About "Our CLUSTER implementation is pessimal" patch
Date: 2010-09-30 18:02:01
Message-ID: 1285869721.1921.1591.camel@ebony
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On Wed, 2010-09-29 at 08:44 -0400, Alvaro Herrera wrote:

> > So, I think "twice disk space of the sum of table and indexes" would be
> > the simplest explanation for safe margin.
>
> Agreed.

Surely the peak space is x3?

Old space + sort space + new space.

--
Simon Riggs www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Training and Services

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