| From: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
|---|---|
| To: | "wangw(dot)fnst(at)fujitsu(dot)com" <wangw(dot)fnst(at)fujitsu(dot)com> |
| Cc: | "kuroda(dot)hayato(at)fujitsu(dot)com" <kuroda(dot)hayato(at)fujitsu(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, Fabrice Chapuis <fabrice636861(at)gmail(dot)com>, Simon Riggs <simon(dot)riggs(at)enterprisedb(dot)com>, Petr Jelinek <petr(dot)jelinek(at)enterprisedb(dot)com>, "tanghy(dot)fnst(at)fujitsu(dot)com" <tanghy(dot)fnst(at)fujitsu(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Ajin Cherian <itsajin(at)gmail(dot)com> |
| Subject: | Re: Logical replication timeout problem |
| Date: | 2022-03-28 06:27:59 |
| Message-ID: | CAA4eK1+TiukvteMXpO4dZtraF-SJHkS9UtTpa5i4P3ir_urOJw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Mar 28, 2022 at 11:41 AM wangw(dot)fnst(at)fujitsu(dot)com
<wangw(dot)fnst(at)fujitsu(dot)com> wrote:
>
> On Mon, Mar 28, 2022 at 9:56 AM Kuroda, Hayato/黒田 隼人 <kuroda(dot)hayato(at)fujitsu(dot)com> wrote:
>
> > Do we have to consider something special case for that?
> > I thought timeout may occur if users have huge table and publish few columns,
> > but it is corner case.
> I think maybe we do not need to deal with this use case.
> The maximum number of table columns allowed by PG is 1600
> (macro MaxHeapAttributeNumber), and after loop through all columns in the
> function logicalrep_write_tuple, the function OutputPluginWrite will be invoked
> immediately to actually send the data to the subscriber. This refreshes the
> last time the subscriber received a message.
> So I think this loop will not cause timeout issues.
>
Right, I also don't think it can be a source of timeout.
--
With Regards,
Amit Kapila.
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