If a potential important release ever changes the data storage structure in a way that makes the old knowledge format unreadable, pg_upgrade won't be usable for such upgrades. (The community will make an effort to avoid such circumstances.)
If you are trying to automate the up grade of numerous clusters, you need to see that clusters with equivalent database schemas involve exactly the same put up-up grade steps for all cluster upgrades; It's because the article-upgrade ways are according to the databases schemas, and not consumer knowledge.
NET halt postgresql-16 Streaming replication and log-shipping and delivery standby servers need to be functioning in the course of this shutdown so they get all improvements.
If you employ connection mode, the update might be considerably quicker (no file copying) and use significantly less disk Area, but you won't be able to accessibility your previous cluster after You begin the new cluster once the improve. Link method also involves that the old and new cluster info directories be in the identical file procedure.
(Tablespaces and pg_wal can be on distinct file methods.) Clone method supplies the same pace and disk Room strengths but won't trigger the previous cluster to become unusable when the new cluster is started out. Clone mode also demands that the old and new facts directories be in the exact same file method. This manner is barely available on selected functioning programs and file programs.
Initialize The brand new cluster using initdb. once again, use suitable initdb flags that match the outdated cluster. Many prebuilt installers do this stage instantly. there isn't any want to start The brand new cluster.
If the situation can be a contrib module, you may perhaps must uninstall the contrib module within the previous cluster and install it in the new cluster after the improve, assuming the module just isn't being used to store person information.
You can even specify consumer and port values, and whether you desire the info data files linked or cloned instead of the default copy habits.
This option can dramatically reduce the time to upgrade a multi-database server operating on a multiprocessor device.
If an mistake occurs while restoring the database schema, pg_upgrade will exit and you will need to revert to the aged cluster as outlined in stage 17 below. to test pg_upgrade yet again, you need to modify the read more old cluster Therefore the pg_upgrade schema restore succeeds.
due to the fact optimizer stats aren't transferred by pg_upgrade, you'll be instructed to operate a command to regenerate that facts at the conclusion of the update. you could really need to set link parameters to match your new cluster.
In the event your installation Listing is just not Edition-specific, e.g., /usr/area/pgsql, it is necessary to move the current PostgreSQL put in directory so it doesn't interfere Along with the new PostgreSQL set up.
For source installs, if you wish to set up The brand new server inside of a personalized place, utilize the prefix variable:
For Windows customers, you need to be logged into an administrative account, and then begin a shell because the postgres user and set the right route:
pg_upgrade would not help upgrading of databases containing table columns using these reg* OID-referencing technique info sorts: