Re: An idle thought

From: Gokulakannan Somasundaram <gokul007(at)gmail(dot)com>
To: Jeff Davis <pgsql(at)j-davis(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Greg Stark <stark(at)mit(dot)edu>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: An idle thought
Date: 2010-03-18 20:29:35
Message-ID: 9362e74e1003181329v402f5b94w972a0064852d148f@mail.gmail.com
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> The visibility map itself is already an example of compression. If
> visibility information were randomly distributed among tuples, the
> visibility map would be nearly useless.
>
>
> I believe it is very difficult to make visibility map update friendly
without compromising durability. But such a functionality is very much
wanted in PG still.

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