Horton

Re: Logical replication timeout problem

Masahiko Sawada <sawada.mshk@gmail.com>

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From: Masahiko Sawada <sawada.mshk@gmail.com>
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: "wangw.fnst@fujitsu.com" <wangw.fnst@fujitsu.com>, Euler Taveira <euler@eulerto.com>, "kuroda.hayato@fujitsu.com" <kuroda.hayato@fujitsu.com>, Peter Smith <smithpb2250@gmail.com>, Fabrice Chapuis <fabrice636861@gmail.com>, Simon Riggs <simon.riggs@enterprisedb.com>, Petr Jelinek <petr.jelinek@enterprisedb.com>, "tanghy.fnst@fujitsu.com" <tanghy.fnst@fujitsu.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Ajin Cherian <itsajin@gmail.com>
Date: 2022-04-20T12:51:52Z
Lists: pgsql-hackers 
On Wed, Apr 20, 2022 at 7:12 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
>
> On Wed, Apr 20, 2022 at 2:38 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
> >
> > On Wed, Apr 20, 2022 at 12:51 PM Masahiko Sawada <sawada.mshk@gmail.com> wrote:
> > >
> > > On Wed, Apr 20, 2022 at 11:46 AM wangw.fnst@fujitsu.com
> > > <wangw.fnst@fujitsu.com> wrote:
> > > > ```
> > >
> > > I'm concerned that this 4-byte padding at the end of the struct could
> > > depend on platforms (there might be no padding in 32-bit platforms?).
> > >
> >
> > Good point, but ...
> >
> > > It seems to me that it's better to put it after fast_forward where the
> > > new field should fall within the padding space.
> > >
> >
> > Can we add the variable in between the existing variables in the
> > structure in the back branches?
> >
>
> I think it should be fine if it falls in the padding space. We have
> done similar changes recently in back-branches [1].

Yes.

> I think it would
> be then better to have it in the same place in HEAD as well?

As far as I can see in the v17 patch, which is for HEAD, we don't add
a variable to LogicalDecodingContext, but did you refer to another
patch?

Regards,

-- 
Masahiko Sawada
EDB:  https://www.enterprisedb.com/

Commits

  1. Fix the logical replication timeout during large DDLs.

  2. Fix the logical replication timeout during large transactions.

  3. Rethink the delay-checkpoint-end mechanism in the back-branches.

  4. Revert "Logical decoding of sequences"

  5. Skip empty transactions for logical replication.

  6. Allow specifying column lists for logical replication

  7. Add decoding of sequences to built-in replication

  8. Fix ABI break introduced by commit 4daa140a2f.

  9. Lag tracking for logical replication