The reason to upgrade from 15.0 to 15.9 is this https://www.postgresql.org/support/security/CVE-2024-10979/
Here it is mentioned that this vulnerability is fixed in 15.9 So our organization wants an upgrade from 15.0 to 15.9 On Sun, 24 Nov 2024 at 21:48, Adrian Klaver <adrian.kla...@aklaver.com> wrote: > On 11/24/24 08:05, Subhash Udata wrote: > > Dear PostgreSQL Community, > > > > I have a production database setup with a primary server and a standby > > server. The database is currently running on *PostgreSQL 15.0*, and I > > plan to upgrade both servers to *15.9*. > > > > I have the following questions regarding the upgrade and replication > > process: > > > > 1. > > > > *Upgrade and Replication Compatibility*: > > > > * My plan is to perform a failover, promote the standby server > > (currently 15.0) to primary, and then upgrade the old primary > > server to version 15.9. > > * After upgrading the old primary server to version 15.9, I want > > to configure it as a standby server and set up streaming > > replication with the new primary server, which will still be > > running version 15.0. > > * Is it possible to establish streaming replication between these > > two versions (*15.0* as primary and *15.9* as standby)? > > 2. > > > > *Efficient Replication Setup*: > > > > * The production database is around *1TB in size*, and creating > > replication using |pg_basebackup| is taking more than 2–3 hours > > to complete. > > * Is there an alternative method to set up replication without > > taking a full backup of the entire cluster but instead using > > only the WAL files that have changed on both servers? > > Why? > > 15.0 --> 15.9(actually you want the latest release 15.10) is a minor > upgrade it involves shutting down the servers installing the new version > binaries on each and restarting them. > > You should read: > > https://www.postgresql.org/support/versioning/ > > It would be a good idea to go through the Release Notes here: > > https://www.postgresql.org/docs/15/release.html > > To see what changed. > > > > > Your guidance and recommendations on these questions will be greatly > > appreciated. > > > > Thank you for your time and support! > > > > Best regards, > > > > Subhash > > > > -- > Adrian Klaver > adrian.kla...@aklaver.com > >
