> On 27 Jun 2025, at 11:41, Dmitry <dsy....@yandex.ru> wrote: > > It seems that the hypothesis has not been confirmed.
Indeed. For some reason your reproduction does not work for me. I tried to create a test from your workload description. PFA patch with a very dirty prototype. to run test you can run: cd contrib/amcheck PROVE_TESTS=t/006_MultiXact_standby.pl make check To check that reproduction worked or not you can read tmp_check/log/006_MultiXact_standby_standby_1.log and see if there are messages "Timed out: nextMXact %u tmpMXact %u". If you could codify our reproduction into this TAP test, we could make it portable. So I can debug the problem on my machine... Either way we can proceed with remote debugging via mailing list :) Thank you! Best regards, Andrey Borodin.
v3-0001-Make-next-multixact-sleep-timed-with-debug-loggin.patch
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v3-0002-Test-concurrent-Multixact-reading-on-stadnby.patch
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