Re: MultiXact\SLRU buffers configuration

From: "Andrey M(dot) Borodin" <x4mmm(at)yandex-team(dot)ru>
To: Daniel Gustafsson <daniel(at)yesql(dot)se>
Cc: Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: MultiXact\SLRU buffers configuration
Date: 2020-07-08 07:03:54
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> 2 июля 2020 г., в 17:02, Daniel Gustafsson <daniel(at)yesql(dot)se> написал(а):
>> On 15 May 2020, at 02:03, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com> wrote:
>> Generally in such cases, condition variables would work. In the
>> attached PoC, the reader side gets no penalty in the "likely" code
>> path. The writer side always calls ConditionVariableBroadcast but the
>> waiter list is empty in almost all cases. But I couldn't cause the
>> situation where the sleep 1000u is reached.
> The submitted patch no longer applies, can you please submit an updated
> version? I'm marking the patch Waiting on Author in the meantime.
Thanks, Daniel! PFA V2

Best regards, Andrey Borodin.

Attachment Content-Type Size
v2-0001-Use-shared-lock-in-GetMultiXactIdMembers-for-offs.patch application/octet-stream 7.6 KB
v2-0002-Make-MultiXact-local-cache-size-configurable.patch application/octet-stream 3.7 KB
v2-0003-Add-conditional-variable-to-wait-for-next-MultXac.patch application/octet-stream 3.4 KB

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