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doc: "Latest checkpoint location" will not match in pg_upgrade

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Mention that "Latest checkpoint location" will not match in pg_upgrade
if the standby server is still running during the upgrade, which is
possible.  "Match" text first appeared in PG 9.5.

Reported-by: Paul Bonaud

Discussion: https://postgr.es/m/c7268794-edb4-1772-3bfd-04c54585c24e@trainline.com

Backpatch-through: 9.5
This commit is contained in:
Bruce Momjian 2018-08-25 13:35:14 -04:00
parent dcb2efdbdd
commit cc2e457fe8
1 changed files with 2 additions and 1 deletions
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doc/src/sgml/ref/pgupgrade.sgml
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@ -326,7 +326,8 @@ NET STOP postgresql-&majorversion;
against the old primary and standby clusters. Verify that the
<quote>Latest checkpoint location</quote> values match in all clusters.
(There will be a mismatch if old standby servers were shut down
before the old primary.) Also, change <varname>wal_level</varname> to
before the old primary or if the old standby servers are still running.)
Also, change <varname>wal_level</varname> to
<literal>replica</literal> in the <filename>postgresql.conf</filename> file on the
new primary cluster.
</para>