Re: WIP: Avoid creation of the free space map for small tables

On Sat, Feb 23, 2019 at 1:24 PM John Naylor <john(dot)naylor(at)2ndquadrant(dot)com> wrote:
>
> On Thu, Feb 21, 2019 at 9:27 PM Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> wrote:
> >
> > I think this test is going to break on nonstandard block sizes. While
> > we don't promise that all tests work on such installs (particularly
> > planner ones), it seems fairly easy to cope with this one -- just use a
> > record size expressed as a fraction of current_setting('block_size').
> > So instead of "1024" you'd write current_setting('block_size') / 8.
> > And then display the relation size in terms of pages, not bytes, so
> > divide pg_relation_size by block size.
>
> I've done this for v6, tested on 16k block size.
>

Thanks, the patch looks good to me. I have additionally tested it 32K
and 1K sized blocks and the test passes. I will commit this early
next week.

--
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com