| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | "Tsunakawa, Takayuki" <tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com>, 'Michael Paquier' <michael(at)paquier(dot)xyz>, 'Robert Haas' <robertmhaas(at)gmail(dot)com>, Julien Rouhaud <rjuju123(at)gmail(dot)com>, Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>, "Jamison, Kirk" <k(dot)jamison(at)jp(dot)fujitsu(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: reloption to prevent VACUUM from truncating empty pages at the end of relation |
| Date: | 2019-02-28 19:55:37 |
| Message-ID: | 20190228195537.GA27608@alvherre.pgsql |
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| Lists: | pgsql-hackers |
On 2019-Feb-28, Tom Lane wrote:
> Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> writes:
> > Hopefully we'll get Tom's patch that addresses the failure-to-truncate
> > issues in pg12.
>
> Hm, are you speaking of the handwaving I did in
> https://www.postgresql.org/message-id/2348.1544474335@sss.pgh.pa.us
> ?
>
> I wasn't really working on that for v12 --- I figured it was way
> too late in the cycle to be starting on such a significant change.
Oh, well, it certainly seems far too late *now*. However, what about
the idea in
https://postgr.es/m/1255.1544562482@sss.pgh.pa.us
namely that we write out the buffers involved? That sounds like it
might be backpatchable, and thus it's not too late for it.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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