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Re: Strange avg value size for index on expression in pg_stats - Mailing list pgsql-general

From Jehan-Guillaume de Rorthais
Subject Re: Strange avg value size for index on expression in pg_stats
Date
Msg-id 20141110120045.7cc7c976@erg
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In response to Strange avg value size for index on expression in pg_stats  (Jehan-Guillaume de Rorthais <ioguix@free.fr>)
List pgsql-general
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On Mon, 10 Nov 2014 11:52:54 +0100
Jehan-Guillaume de Rorthais <ioguix@free.fr> wrote:

> Hello,
>
> I'm not sure if I should post here or on pgsql-hackers.
>
> While investigating about a wrong result with my btree bloat estimation query,
> I found a strange stat deviation between the average size of a value in its
> table and its average size in one index on the "lower" expression.

Oh, I forgot to add links to this query, for testing purpose:

  * https://gist.github.com/ioguix/c29d5790b8b93bf81c27
  * explanations, see http://blog.ioguix.net/tag/bloat/

Cheers,

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