| From: | Alexander Lakhin <exclusion(at)gmail(dot)com> |
|---|---|
| To: | Melanie Plageman <melanieplageman(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Tomas Vondra <tomas(at)vondra(dot)me>, David Rowley <dgrowleyml(at)gmail(dot)com>, Kirill Reshke <reshkekirill(at)gmail(dot)com>, Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, Xuneng Zhou <xunengzhou(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi> |
| Subject: | Re: eliminate xl_heap_visible to reduce WAL (and eventually set VM on-access) |
| Date: | 2026-04-03 05:00:00 |
| Message-ID: | 97529f5a-ec10-46b1-ab50-4653126c6889@gmail.com |
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| Lists: | pgsql-hackers |
Hello Melanie and Andres,
31.03.2026 19:19, Melanie Plageman wrote:
> Thanks for the reply! I have committed the patches in this thread and
> marked the CF entry accordingly.
I've come across an interesting failure produced starting from 378a21618:
when using a build made with CFLAGS="-DRELCACHE_FORCE_RELEASE" and
echo "io_method = sync" >/tmp/temp.config, the test run:
TEMP_CONFIG=/tmp/temp.config TESTS=temp make -s check-tests
fails as below:
--- .../src/test/regress/expected/temp.out 2026-02-13 06:15:55.887368624 +0200
+++ .../src/test/regress/results/temp.out 2026-04-03 07:51:36.735504156 +0300
@@ -493,11 +493,7 @@
-- Check that read streams deal with lower number of pins available
SELECT count(*), max(a) max_a, min(a) min_a, max(cnt) max_cnt FROM test_temp;
- count | max_a | min_a | max_cnt
--------+-------+-------+---------
- 10000 | 10000 | 1 | 0
-(1 row)
-
+ERROR: no empty local buffer available
ROLLBACK;
Could you look please, if it indicates some regression?
Best regards,
Alexander
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