If a long run here important release ever adjustments the information storage structure in a method that makes the aged data format unreadable, pg_upgrade will not be usable for these kinds of updates. (The community will make an effort to avoid such scenarios.)

If you are attempting to automate the upgrade of numerous clusters, you ought to see that clusters with similar database schemas call for the identical submit-improve actions for all cluster updates; It is because the write-up-enhance steps are determined by the database schemas, and never consumer details.

NET STOP postgresql-16 Streaming replication and log-shipping standby servers will have to be managing in the course of this shutdown in order that they get all variations.

significant PostgreSQL releases on a regular basis include new options That usually alter the format from the program tables, but the internal data storage structure hardly ever changes. pg_upgrade employs this truth to accomplish fast upgrades by producing new system tables and simply reusing the outdated person information data files.

When working with link mode, standby servers could be promptly upgraded working with rsync. to perform this, from a Listing on the principal server that's previously mentioned the outdated and new database cluster directories, operate this on the

Initialize The brand new cluster applying initdb. yet again, use compatible initdb flags that match the old cluster. Many prebuilt installers do this move automatically. there is not any need to have to get started on The brand new cluster.

Files that were not linked on the key are copied from the main on the standby. (They are usually small.) This supplies swift standby updates. sadly, rsync needlessly copies data files related to momentary and unlogged tables for the reason that these documents don't Ordinarily exist on standby servers.

All failure, rebuild, and reindex conditions is going to be documented by pg_upgrade should they influence your installation; submit-improve scripts to rebuild tables and indexes will likely be created quickly.

Build the new PostgreSQL supply with configure flags which have been appropriate with the old cluster. pg_upgrade will Look at pg_controldata to make certain all options are appropriate before starting the update.

What this does is always to history the hyperlinks developed by pg_upgrade's backlink mode that connect documents in the previous and new clusters on the key server. It then finds matching information from the standby's old cluster and generates backlinks for them inside the standby's new cluster.

the previous and new cluster directories about the standby. The Listing composition beneath the specified directories on the principal and standbys ought to match. seek the advice of the rsync guide website page for information on specifying the distant Listing, e.g.,

Should your set up Listing will not be version-particular, e.g., /usr/nearby/pgsql, it's important to maneuver the current PostgreSQL set up Listing so it does not interfere Using the new PostgreSQL installation.

directory to make use of for postmaster sockets throughout update; default is current Functioning directory; ecosystem variable PGSOCKETDIR

at the time the current PostgreSQL server is shut down, it is actually Harmless to rename the PostgreSQL installation Listing; assuming the outdated directory is /usr/local/pgsql, you are able to do:

The brand new PostgreSQL executable directory; default could be the directory wherever pg_upgrade resides; environment variable PGBINNEW