On Tue, 2022-11-01 at 11:25 +0530, KK CHN wrote:
> I am trying WAL replication,the setup is working with a primary and Standby server.
>
> Query is : When the primary crashes due an unforeseen reason,
> what may happen to the uncommitted transactions at primary ?
Their effects remain invisible.
> Those won't replicate to the standby right ?
They may be replicated, but their effects will remain invisible there too.
> How much data loss occurs in this case ?
Data loss? I don't understand. There is no data loss with replication.
If an incomplete transaction is rolled back, that is no data loss.
> What is the mechanism to overcome this uncommitted transaction loss due to primary
> server crash which is not replicated to the standby server ?
I don't understand. Are you perhaps talking about failover?
Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com
