| From: | "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com> |
|---|---|
| To: | "houzj(dot)fnst(at)fujitsu(dot)com" <houzj(dot)fnst(at)fujitsu(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | shveta malik <shveta(dot)malik(at)gmail(dot)com>, "wangw(dot)fnst(at)fujitsu(dot)com" <wangw(dot)fnst(at)fujitsu(dot)com>, "shiy(dot)fnst(at)fujitsu(dot)com" <shiy(dot)fnst(at)fujitsu(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> |
| Subject: | RE: Perform streaming logical transactions by background workers and parallel apply |
| Date: | 2023-02-07 02:03:05 |
| Message-ID: | TYAPR01MB5866F66540C6331A2A96D469F5DB9@TYAPR01MB5866.jpnprd01.prod.outlook.com |
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| Lists: | pgsql-hackers |
Dear Hou,
> I think PARALLEL_APPLY_MAIN waits for two kinds of event: 1) wait for new
> message from the queue 2) wait for the partial file state to be set. So, I
> think introducing a new general event for them is better and it is also
> consistent with the WAIT_EVENT_LOGICAL_APPLY_MAIN which is used in the
> main
> loop of leader apply worker(LogicalRepApplyLoop). But the event in
> pg_send_data() is only for message send, so it seems fine to use
> WAIT_EVENT_MQ_SEND, besides MQ_SEND is also unique in parallel apply
> worker and
> user can distinglish without adding new event.
Thank you for your explanation. I think both of you said are reasonable.
Best Regards,
Hayato Kuroda
FUJITSU LIMITED
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