| From: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: pg_class.reltuples of brin indexes |
| Date: | 2018-03-27 14:28:03 |
| Message-ID: | 20180327142803.5tzvrkouc43arddc@alvherre.pgsql |
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| Lists: | pgsql-hackers |
Tom Lane wrote:
> Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> writes:
> > I think number of index tuples makes sense, as long as that's what the
> > costing needs. That is, it's up to the index AM to define it. But it
> > clearly should not flap like this ...
>
> > And it's not just BRIN. This is what I get with a GIN index:
>
> Sounds like the same kind of thing we just fixed for SP-GiST :-(
Most likely I modelled the BRIN code after GIN.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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