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doc: pg_upgrade: use dynamic new cluster major version numbers
Also update docs to use more recent old version numbers Reported-by: mark.a.sloan@gmail.com Discussion: https://postgr.es/m/169506804412.3727336.8571753495127355296@wrigleys.postgresql.org Backpatch-through: 16
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doc/src/sgml/ref/pgupgrade.sgml

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@@ -40,9 +40,9 @@ PostgreSQL documentation
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<application>pg_upgrade</application> (formerly called <application>pg_migrator</application>) allows data
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stored in <productname>PostgreSQL</productname> data files to be upgraded to a later <productname>PostgreSQL</productname>
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major version without the data dump/restore typically required for
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major version upgrades, e.g., from 9.5.8 to 9.6.4 or from 10.7 to 11.2.
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It is not required for minor version upgrades, e.g., from 9.6.2 to 9.6.3
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or from 10.1 to 10.2.
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major version upgrades, e.g., from 12.14 to 13.10 or from 14.9 to 15.5.
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It is not required for minor version upgrades, e.g., from 12.7 to 12.8
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or from 14.1 to 14.5.
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</para>
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<para>
@@ -390,14 +390,14 @@ make prefix=/usr/local/pgsql.new install
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Make sure both database servers are stopped using, on Unix, e.g.:
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<programlisting>
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pg_ctl -D /opt/PostgreSQL/9.6 stop
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pg_ctl -D /opt/PostgreSQL/12 stop
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pg_ctl -D /opt/PostgreSQL/&majorversion; stop
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</programlisting>
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or on Windows, using the proper service names:
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<programlisting>
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NET STOP postgresql-9.6
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NET STOP postgresql-12
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NET STOP postgresql-&majorversion;
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</programlisting>
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</para>
@@ -471,9 +471,9 @@ SET PATH=%PATH%;C:\Program Files\PostgreSQL\&majorversion;\bin;
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<programlisting>
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pg_upgrade.exe
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--old-datadir "C:/Program Files/PostgreSQL/9.6/data"
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--old-datadir "C:/Program Files/PostgreSQL/12/data"
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--new-datadir "C:/Program Files/PostgreSQL/&majorversion;/data"
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--old-bindir "C:/Program Files/PostgreSQL/9.6/bin"
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--old-bindir "C:/Program Files/PostgreSQL/12/bin"
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--new-bindir "C:/Program Files/PostgreSQL/&majorversion;/bin"
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</programlisting>
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@@ -603,8 +603,8 @@ rsync --archive --delete --hard-links --size-only --no-inc-recursive old_cluster
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remote directory, e.g.,
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<programlisting>
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rsync --archive --delete --hard-links --size-only --no-inc-recursive /opt/PostgreSQL/9.5 \
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/opt/PostgreSQL/9.6 standby.example.com:/opt/PostgreSQL
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rsync --archive --delete --hard-links --size-only --no-inc-recursive /opt/PostgreSQL/12 \
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/opt/PostgreSQL/&majorversion; standby.example.com:/opt/PostgreSQL
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</programlisting>
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You can verify what the command will do using
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<application>rsync</application> command for each tablespace directory, e.g.:
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<programlisting>
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rsync --archive --delete --hard-links --size-only --no-inc-recursive /vol1/pg_tblsp/PG_9.5_201510051 \
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/vol1/pg_tblsp/PG_9.6_201608131 standby.example.com:/vol1/pg_tblsp
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rsync --archive --delete --hard-links --size-only --no-inc-recursive /vol1/pg_tblsp/PG_12_201909212 \
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/vol1/pg_tblsp/PG_&majorversion;_202307071 standby.example.com:/vol1/pg_tblsp
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</programlisting>
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If you have relocated <filename>pg_wal</filename> outside the data

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