Re: hot standby in Postgresql 12 - Mailing list pgsql-admin

From Rajni Baliyan
Subject Re: hot standby in Postgresql 12
Date
Msg-id CAG5RORO+JgbM6vHZwiZPNURf1mYqLsL6xz9LNG+gY3+zxbpvzA@mail.gmail.com
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In response to Re: hot standby in Postgresql 12  ("David G. Johnston" <david.g.johnston@gmail.com>)
Responses Re: hot standby in Postgresql 12
List pgsql-admin
As David highlighted,
>> I took the error from the cp command to mean that this was in fact a warm standby regardless of any claims by the poster.  I’ll readily admit I am not that familiar with this stuff though.
Seems your archive command is not working properly. Set it first and then try again.
Also, please  share your postgresql.auto.conf ( remove confidential information like  - password , username , IP  etc. , if any)

Regards
Rajni

On Wed, Jan 20, 2021 at 2:11 AM David G. Johnston <david.g.johnston@gmail.com> wrote:
On Tuesday, January 19, 2021, Laurenz Albe <laurenz.albe@cybertec.at> wrote:

> > cp: cannot stat '/u01/archive/000000030000000000000035': No such file or directory
> > 2021-01-18 07:31:01.043 UTC   [21079]LOG:  started streaming WAL from primary at 0/35000000 on timeline 3
> >
>
> And now the standby is waiting for the next wal file to be archived by the primary.
> You should probably set archive_timeout to a non-zero value since the primary doesn’t
>  seem very busy (though you also still need to do at least one write, empty wal files
>  don’t get rotated out and archived.)

If the standby is *streaming* WAL, it is *not* waiting for a WAL segment to be archived.
WAL is streamed to the standby right away.

I took the error from the cp command to mean that this was in fact a warm standby regardless of any claims by the poster.  I’ll readily admit I am not that familiar with this stuff though.

David J.
 

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