Re: MultiXact\SLRU buffers configuration

From: Gilles Darold <gilles(at)darold(dot)net>
To: Andrey Borodin <x4mmm(at)yandex-team(dot)ru>
Cc: Tomas Vondra <tomas(dot)vondra(at)enterprisedb(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Alexander Korotkov <aekorotkov(at)gmail(dot)com>, Anastasia Lubennikova <a(dot)lubennikova(at)postgrespro(dot)ru>, Daniel Gustafsson <daniel(at)yesql(dot)se>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: MultiXact\SLRU buffers configuration
Date: 2020-12-09 10:51:36
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Hi Andrey,

Thanks for the backport. I have issue with the first patch "Use shared
lock in GetMultiXactIdMembers for offsets and members"
(v1106-0001-Use-shared-lock-in-GetMultiXactIdMembers-for-o.patch) the
applications are not working anymore when I'm applying it. Also PG
regression tests are failing too on several part.

test insert_conflict              ... ok
test create_function_1            ... FAILED
test create_type                  ... FAILED
test create_table                 ... FAILED
test create_function_2            ... FAILED
test copy                         ... FAILED
test copyselect                   ... ok
test copydml                      ... ok
test create_misc                  ... FAILED
test create_operator              ... FAILED
test create_procedure             ... ok
test create_index                 ... FAILED
test index_including              ... ok
test create_view                  ... FAILED
test create_aggregate             ... ok
test create_function_3            ... ok
test create_cast                  ... ok
test constraints                  ... FAILED
test triggers                     ... FAILED
test inherit                      ...

This is also where I left my last try to back port for PG11, I will try
to fix it again but it could take time to have it working.

Best regards,

Gilles Darold

Le 08/12/2020 à 18:52, Andrey Borodin a écrit :
> Hi Gilles!
> Many thanks for your message!
>> 8 дек. 2020 г., в 21:05, Gilles Darold <gilles(at)darold(dot)net> написал(а):
>> I know that this report is not really helpful
> Quite contrary - this benchmarks prove that controllable reproduction exists. I've rebased patches for PG11. Can you please benchmark them (without extending SLRU)?
> Best regards, Andrey Borodin.

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