Обсуждение: [COMMITTERS] pgsql: Fix BRIN summarization concurrent with extension
Fix BRIN summarization concurrent with extension If a process is extending a table concurrently with some BRIN summarization process, it is possible for the latter to miss pages added by the former because the number of pages is computed ahead of time. Fix by determining a fresh relation size after inserting the placeholder tuple: any process that further extends the table concurrently will update the placeholder tuple, while previous pages will be processed by the heap scan. Reported-by: Tomas Vondra Reviewed-by: Tom Lane Author: Álvaro Herrera Discussion: https://postgr.es/m/083d996a-4a8a-0e13-800a-851dd09ad8cc@2ndquadrant.com Backpatch-to: 9.5 Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/ec42a1dcb30de235b252f6d4972f2f2bdb2e47f2 Modified Files -------------- src/backend/access/brin/brin.c | 90 ++++++++++++++++++++++++++++-------------- 1 file changed, 61 insertions(+), 29 deletions(-) -- Sent via pgsql-committers mailing list (pgsql-committers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
Alvaro Herrera <alvherre@alvh.no-ip.org> writes:
> Fix BRIN summarization concurrent with extension
Buildfarm is entirely unhappy ...
regards, tom lane
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Tom Lane wrote: > Alvaro Herrera <alvherre@alvh.no-ip.org> writes: > > Fix BRIN summarization concurrent with extension > > Buildfarm is entirely unhappy ... Will fix shortly. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services -- Sent via pgsql-committers mailing list (pgsql-committers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers