How to upgrade postgreSQL

English Applications
1

Hello,

Today I install postgresql16 with an installed postgresql15, looking how to do pg_upgrade, found that all distro except openSUSe have a folder with the data version (/usr/lib/postgresql{15,16}/data or /var/lib/pgsql/data{15,16}).

following the command structure:

pg_upgrade --old-bindir=BINDIR \
           --new-bindir=BINDIR \
           --old-datadir=DATADIR \
           --new-datadir=DATADIR \

So, following this with openSUSe installation, we will have:

pg_upgrade --old-bindir=/usr/lib/postgresql15/bin \
           --new-bindir=/usr/lib/postgresql16/bin \
           --old-datadir=/var/lib/pgsql/data (default) \
           --new-datadir=/var/lib/pgsql/data (replace itself?) \

don’t know if this is safe to do or which will be the best approach to this.

maybe cp -r /var/lib/pgsql/data /var/lib/pgsql/data.old and do:

pg_upgrade --old-bindir=/usr/lib/postgresql15/bin \
           --new-bindir=/usr/lib/postgresql16/bin \
           --old-datadir=/var/lib/pgsql/data.old \
           --new-datadir=/var/lib/pgsql/data \

Which one is the best practice to do the upgrade?

2

On what?
You tagged this as “other”. That makes us even more curious on what unsupported version of openSUSE you are trying to do this.

3

Leap 15.6.

4

someone, can tell me if doing pg_upgrade is safe?, when openSUSE share the data folder between versions.

5

Do you have a recent backup of your database (and did you check that you can restore from it)?