Horton

Re: [PATCH] Speedup truncates of relation forks

Fujii Masao <masao.fujii@gmail.com>

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From: Fujii Masao <masao.fujii@gmail.com>
To: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: "Jamison, Kirk" <k.jamison@jp.fujitsu.com>, Thomas Munro <thomas.munro@gmail.com>, Masahiko Sawada <sawada.mshk@gmail.com>, "Tsunakawa, Takayuki" <tsunakawa.takay@jp.fujitsu.com>, Tomas Vondra <tomas.vondra@2ndquadrant.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>, Adrien Nayrat <adrien.nayrat@anayrat.info>
Date: 2019-09-13T13:05:31Z
Lists: pgsql-hackers

Commits

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  1. Speedup truncations of relation forks.

  2. Remove unused smgrdounlinkfork() function.

  3. Accelerate end-of-transaction dropping of relations

On Fri, Sep 13, 2019 at 9:51 PM Alvaro Herrera <alvherre@2ndquadrant.com> wrote:
>
> On 2019-Sep-13, Fujii Masao wrote:
>
> > On Mon, Sep 9, 2019 at 3:52 PM Jamison, Kirk <k.jamison@jp.fujitsu.com> wrote:
>
> > > > Please add a preliminary patch that removes the function.  Dead code is good,
> > > > as long as it is gone.  We can get it pushed ahead of the rest of this.
> > >
> > > Alright. I've attached a separate patch removing the smgrdounlinkfork.
> >
> > Per the past discussion, some people want to keep this "dead" function
> > for some reasons. So, in my opinion, it's better to just enclose the function
> > with #if NOT_USED and #endif, to keep the function itself as it is, and then
> > to start new discussion on hackers about the removal of that separatedly
> > from this patch.
>
> I searched for anybody requesting to keep the function.  I couldn't find
> anything.  Tom said in 2012:
> https://www.postgresql.org/message-id/1471.1339106082@sss.pgh.pa.us

Yes. And I found Andres.
https://www.postgresql.org/message-id/20180621174129.hogefyopje4xaznu@alap3.anarazel.de

> > As committed, the smgrdounlinkfork case is actually dead code; it's
> > never called from anywhere.  I left it in place just in case we want
> > it someday.
>
> but if no use has appeared in 7 years, I say it's time to kill it.

+1

Regards,

-- 
Fujii Masao