Re: Table size does not include toast size
Greg Stark <gsstark@mit.edu>
From: Greg Stark <gsstark@mit.edu>
To: Greg Smith <greg@2ndquadrant.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Bernd Helmle <mailings@oopsware.de>, Rafael Martinez <r.m.guerrero@usit.uio.no>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2009-12-21T18:01:54Z
Lists: pgsql-hackers
On Mon, Dec 21, 2009 at 5:02 PM, Greg Smith <greg@2ndquadrant.com> wrote: > Tom Lane wrote: >> >> Perhaps invent pg_table_size() = base table + toast table + toast index >> and pg_indexes_size() = all other indexes for table >> giving us the property pg_table_size + pg_indexes_size = >> pg_total_relation_size >> > > Right; that's exactly the way I'm computing things now, I just have to crawl > way too much catalog data to do it. I also agree that if we provide > pg_table_size, the issue of "pg_relation_size doesn't do what I want" goes > away without needing to even change the existing documentation--people don't > come to that section looking for "relation", they're looking for "table". > > Bernd, there's a basic spec if you have time to work on this. What about, the visibility maps and free space maps? -- greg