Re: Missing rows after migrating from postgres 11 to 12 with logical replication

On 12/23/20 1:40 AM, Lars Vonk wrote:
> The full setup is:
> 
> **Before:
> 11 primary -> 11 hotstandby binary
> 
> **During migration
> 11 primary -> 11 hotstandby binary
>    | -> 12 new instance via logical
>            |-> 12 new replica via binary
> 
> **After migration
> 12 primary
> |-> 12 replica via binary
> 
> 

There are several moving parts here. I have to believe the problem is 
related. Just not sure how to figure it out after the fact. The best I 
can come up with is retry the process and monitor closely in real or 
near real time to see if you can catch the issue. Another option is to 
reduce the parts count by not running the binary 12 --> 12 replication 
at the same time you are doing the 11 --> 12 logical replication.


-- 
Adrian Klaver
adrian.klaver@aklaver.com