On Thursday, October 6, 2022 9:00 PM Kuroda, Hayato/黒田 隼人 <kuroda.hayato@fujitsu.com> wrote:
>
> Dear Hou,
>
> > Thanks for the suggestion.
> >
> > I tried to add a WaitLatch, but it seems affect the performance
> > because the Latch might not be set when leader send some message to
> > parallel apply worker which means it will wait until timeout.
>
> Yes, currently it leader does not notify anything.
> To handle that leader must set a latch in parallel_apply_send_data().
> It can be done if leader accesses to winfo->shared-> logicalrep_worker_slot_no,
> and sets a latch for LogicalRepCtxStruct->worker[slot_no].
Thanks for the suggestion. I think we could do that, but I feel it's not great
to set latch frequently. Besides, to access the LogicalRepCtxStruct->worker[]
we would need to hold a lock which might also bring some overhead.
Best regards,
Hou zj
