On Fri, 2024-07-12 at 20:41 +0530, Mukesh Tanuku wrote: > I have a question with postgres HA setup. > We are setting up a 2 node postgres cluster with async streaming replication, we want to > define a RPO (Recovery point objective) in case of primary failure. > > How can we best define the RPO in this setup? since it's an async streaming replication > setup there might be a chance of data loss which is proportional to the replication delay. > > Is there any way we can configure the delay duration, like for example to make sure every > 10 mins the standby sync has to happen with primary?
When there is a delay, it is usually because replay at the standby is delayed. The WAL information is still replicated. You won't lose that information on failover; it will just make the failover take longer.
Unless you have a network problem, you should never lose more than a fraction of a second.
