Re: [External] Re: WAL Replication query

On 11/1/22 01:53, Laurenz Albe wrote:
> On Tue, 2022-11-01 at 06:44 +0000, Sacheen Birhade wrote:
>> If replication is in asynchronous then there will be data loss, right Laurenz?
> Why? The data will perhaps show up on the standby a little later, but why is
> that data loss? Remember that the question was about replication, and there
> was no mention of failover.

No, the question was about a crash during replication: OP (not Sacheen,
unless that person is using two email addresses) explicitly asked "*When the
primary crashes*  due an unforeseen reason (what happens)?"

If the two database systems are really busy, and especially if the network
connection isn't fast enough, *async* replication means there *might* be
some transactions committed on Primary which were queued for transmission,
but hadn't yet made it to the Secondary, right?

--
Angular momentum makes the world go 'round.