| From: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> |
|---|---|
| To: | "Tsunakawa, Takayuki" <tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com> |
| Cc: | Michael Paquier <michael(at)paquier(dot)xyz>, 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>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, 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: | 2019-02-26 07:56:37 |
| Message-ID: | CAD21AoAQQUnYuMzcdFh-qznxF40AeNv=t-Tr=8_LX=TZGzfH9A@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Feb 26, 2019 at 3:29 PM Tsunakawa, Takayuki
<tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com> wrote:
>
> From: Masahiko Sawada [mailto:sawada(dot)mshk(at)gmail(dot)com]
> > This test expects that the inserted tuple is always reclaimed by
> > subsequent vacuum, but it's not always true if there are concurrent
> > transactions. So size of the reloptions_test table will not be 0 if
> > the tuple is not vacuumed. In my environment this test sometimes
> > failed with 'make check -j 4'.
>
> Hmm, "make check -j4" certainly fails on my poor VM, too.
>
> Modifying src/test/regress/parallel_schedule to put the reloptions test on a separate line seems to have fixed this issue. Do you think this is the correct remedy?
>
Yeah, that would work. Or it's kind of hackie but the rolling back the
insertion instead of INSERT and DELETE might also work.
Regards,
--
Masahiko Sawada
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center
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