| From: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Victor Yegorov <vyegorov(at)gmail(dot)com>, PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: BUG #15290: Stuck Parallel Index Scan query |
| Date: | 2018-07-25 09:55:57 |
| Message-ID: | CAEepm=0wJF4OrQ-b=jVPzkc1iPFxBmLAkX5UCDr_D2Pdw1wZ3A@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Wed, Jul 25, 2018 at 5:46 PM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>> I think here we can release the current page lock
>> before calling _bt_parallel_seize as we don't need it to get the next
>> page.
>
> I have written a patch on the above lines and manually verified (by
> reproducing the issue via debugger) that it fixes the issue. Thomas,
> Victor, is it possible for you guys to see if the attached fixes the
> issue for you?
The patch looks good to me. It fixes the problem for my reproducer
(BTW that works better with an extra zero on the generate_series
number).
--
Thomas Munro
http://www.enterprisedb.com
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