RE: Perform streaming logical transactions by background workers and parallel apply

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