Re: Interval for launching the table sync worker

I was thinking the same.

At Thu, 6 Apr 2017 11:33:22 +0900, Masahiko Sawada <sawada.mshk@gmail.com> wrote in
<CAD21AoDCnyRJDUY=ESVVe68AukvOP2dFomTeBFpAd1TiFbjsGg@mail.gmail.com>
> Hi all,
> 
> While testing table sync worker for logical replication I noticed that
> if the table sync worker of logical replication failed to insert the
> data for whatever reason, the table sync worker process exits with
> error. And then the main apply worker launches the table sync worker
> again soon without interval. This routine is executed at very high
> frequency without interval.
> 
> Should we do put a interval (wal_retrieve_interval or make a new GUC
> parameter?) for launching the table sync worker?

After introducing encoding conversion, untranslatable characters
in a published table causes this situation. Interval can reduce
the frequence of reconnecting, but I think that walreciever
should refrain from reconnecting on unrecoverable(or repeating)
error in walsender.

regards,

-- 
Kyotaro Horiguchi
NTT Open Source Software Center