| 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 |
| Message-ID: | 2ECE132B-C042-4489-930E-DBC5D0DAB84A@yandex-team.ru |
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| Thread: | |
| Lists: | pgsql-hackers |
> 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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