| From: | Aleksander Alekseev <aleksander(at)tigerdata(dot)com> |
|---|---|
| To: | PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, Jacob Brazeal <jacob(dot)brazeal(at)gmail(dot)com>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com> |
| Subject: | Re: Write skew observed under serializable isolation |
| Date: | 2026-09-22 12:30:43 |
| Message-ID: | CAJ7c6TN_MdeN1Uinwywm=J9ZCGsSs11w217OiT0sP0hdsEcWiA@mail.gmail.com |
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| Lists: | pgsql-hackers |
Hi Andres,
Thanks for the feedback.
> Seems like it'd be good to add a note to the SO_TYPE definitions mentioning
> that this needs to be updated for additional scans.
Good point. Added.
> Do we have test coverage for the bitmap scan cases?
It looks like predicate-lock-hot-tuple.spec sort of covers it but it
is not guaranteed to use bitmap scan and all in all this is a
regression test for another scenario. v4 adds a dedicated test. I
choose not to split the patch into two parts.
--
Best regards,
Aleksander Alekseev
| Attachment | Content-Type | Size |
|---|---|---|
| v4-0001-Fix-write-skew-under-SERIALIZABLE-for-TID-range-s.patch | text/x-patch | 15.2 KB |
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