| From: | John Naylor <john(dot)naylor(at)2ndquadrant(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk>, Amit Kapila <akapila(at)postgresql(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: pgsql: Avoid creation of the free space map for small heap relations. |
| Date: | 2019-01-28 06:20:29 |
| Message-ID: | CACPNZCtP6QRrFYsGhv7V4OJT5Lsa5GL6pt1rhMGQmPk58UnTYQ@mail.gmail.com |
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On Mon, Jan 28, 2019 at 6:58 AM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> On Mon, Jan 28, 2019 at 11:10 AM Andrew Gierth
> you just need to create free space on a page that didn't have enough
> > before? It might be worth tweaking the fillfactor rather than trying to
> > delete anything.
> >
>
> No, it also depends on vacuum to remove rows and then truncate the
> relation accordingly.
That particular test could be removed -- it's just verifying behavior
that's already been there for years and is a direct consquence of
normal truncation combined with the addressing scheme of the FSM
logic.
--
John Naylor https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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