On Wed, Jan 18, 2012 at 7:01 PM, Noah Misch <n...@leadboat.com> wrote:
> On Wed, Jan 18, 2012 at 09:46:20AM -0500, Jaime Casanova wrote:
>> ignoring all non-leaf pages still gives a considerable difference
>> between pgstattuple and relation_free_space()
> pgstattuple() counts the single B-tree meta page as always-full, while
> relation_free_space() skips it for all purposes.  For tiny indexes, that can
> shift the percentage dramatically.

ok, i will reformulate the question. why is fine ignoring non-leaf
pages but is not fine to ignore the meta page?

Jaime Casanova         www.2ndQuadrant.com
Professional PostgreSQL: Soporte 24x7 y capacitación

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