Re: Select max(foo) and select count(*) optimization

CoL <col@mportal.hu>

From: CoL <col@mportal.hu>
To: pgsql-performance@postgresql.org
Date: 2004-01-06T11:51:13Z
Lists: pgsql-performance
Hi,

Shridhar Daithankar wrote:

> 
> select relpages,reltuples from pg_class where relname=<tablename>;
> 
> Assuming the stats are recent enough, it would be much faster and accurate..

this needs an analyze <tablename>; before select from pg_class, cause 
only after analyze will update pg the pg_class

C.