pgsql: BRIN autosummarization may need a snapshot
| От | Álvaro Herrera |
|---|---|
| Тема | pgsql: BRIN autosummarization may need a snapshot |
| Дата | |
| Msg-id | E1vGG5a-004zIy-0q@gemulon.postgresql.org обсуждение исходный текст |
| Список | pgsql-committers |
BRIN autosummarization may need a snapshot It's possible to define BRIN indexes on functions that require a snapshot to run, but the autosummarization feature introduced by commit 7526e10224f0 fails to provide one. This causes autovacuum to leave a BRIN placeholder tuple behind after a failed work-item execution, making such indexes less efficient. Repair by obtaining a snapshot prior to running the task, and add a test to verify this behavior. Author: Álvaro Herrera <alvherre@kurilemu.de> Reported-by: Giovanni Fabris <giovanni.fabris@icon.it> Reported-by: Arthur Nascimento <tureba@gmail.com> Backpatch-through: 13 Discussion: https://postgr.es/m/202511031106.h4fwyuyui6fz@alvherre.pgsql Branch ------ REL_13_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/3c7b47974ec7332a2bb98cf51888dd4a4f367506 Modified Files -------------- src/backend/postmaster/autovacuum.c | 2 ++ src/test/modules/brin/t/01_workitems.pl | 39 +++++++++++++++++++++++++++++---- 2 files changed, 37 insertions(+), 4 deletions(-)
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