On Wed, Jan 18, 2012 at 7:01 PM, Noah Misch <noah@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
