On 2020-Aug-17, Alvaro Herrera wrote: > Hmm, the only explanation I can see for this is that autovacuum managed > to summarize the range before the test script did it. So the solution > would simply be to disable autovacuum for the table across the whole > script. > > I'm running the scripts and dependencies to verify that fix, but under > CLOBBER_CACHE_ALWAYS that takes quite a bit.
I ran a subset of tests a few times, but was unable to reproduce the problem. I'll just push this to all branches and hope for the best. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
>From 6e70443edacfc86674995c0c10ade0aec7a4fddf Mon Sep 17 00:00:00 2001 From: Alvaro Herrera <alvhe...@alvh.no-ip.org> Date: Mon, 17 Aug 2020 16:20:06 -0400 Subject: [PATCH] Disable autovacuum for BRIN test table This should improve stability in the tests. Per buildfarm member hyrax (CLOBBER_CACHE_ALWAYS) via Tom Lane. Discussion: https://postgr.es/m/871534.1597503...@sss.pgh.pa.us --- src/test/regress/expected/brin.out | 2 +- src/test/regress/sql/brin.sql | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/src/test/regress/expected/brin.out b/src/test/regress/expected/brin.out index 0b14c73fc6..18403498df 100644 --- a/src/test/regress/expected/brin.out +++ b/src/test/regress/expected/brin.out @@ -26,7 +26,7 @@ CREATE TABLE brintest (byteacol bytea, int4rangecol int4range, lsncol pg_lsn, boxcol box -) WITH (fillfactor=10); +) WITH (fillfactor=10, autovacuum_enabled=off); INSERT INTO brintest SELECT repeat(stringu1, 8)::bytea, substr(stringu1, 1, 1)::"char", diff --git a/src/test/regress/sql/brin.sql b/src/test/regress/sql/brin.sql index 1289e76ecb..d1a82474f3 100644 --- a/src/test/regress/sql/brin.sql +++ b/src/test/regress/sql/brin.sql @@ -26,7 +26,7 @@ CREATE TABLE brintest (byteacol bytea, int4rangecol int4range, lsncol pg_lsn, boxcol box -) WITH (fillfactor=10); +) WITH (fillfactor=10, autovacuum_enabled=off); INSERT INTO brintest SELECT repeat(stringu1, 8)::bytea, -- 2.20.1
