Re: reloption to prevent VACUUM from truncating empty pages at the end of relation

On Mon, Apr 8, 2019 at 7:29 PM Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
>
> On Mon, Apr 8, 2019 at 7:22 PM Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
> >
> > On Mon, Apr 8, 2019 at 5:30 PM Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
> > >
> > > On Mon, Apr 8, 2019 at 5:15 PM Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
> > > >
> > > > On Mon, Apr 8, 2019 at 3:58 PM Julien Rouhaud <rjuju123(at)gmail(dot)com> wrote:
> > > > >
> > > > > On Mon, Apr 8, 2019 at 8:01 AM Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
> > > > > >
> > > > > > 2019年4月8日(月) 14:22 Tsunakawa, Takayuki <tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com>:
> > > > > >>
> > > > > >> From: Alvaro Herrera [mailto:alvherre(at)2ndquadrant(dot)com]
> > > > > >> > "vacuum_truncate" gets my vote too.
> > > > > >>
> > > > > >> +1
> > > > > >
> > > > > >
> > > > > > +1
> > > > > > ISTM that we have small consensus to
> > > > > > use "vacuum_truncate".
> > > > >
> > > > > I'm also fine with this name, and I also saw reports that this option
> > > > > is already needed in some production workload, as Andres explained.
> > > >
> > > > OK, so I pushed the "vacuum_truncate" version of the patch.
> > >
> > > Thank you!
> > >
> > > "TRUNCATE" option for vacuum command should be added to the open items?
> >
> > Yes, I think.
>
> Added.
>
> > Attached is the patch which adds TRUNCATE option into VACUUM.
>
> Thank you for the patch! I will review it.
>

Sorry for the late. I've reviewed the patch and it looks good to me.

Regards,

--
Masahiko Sawada
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center