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doc: add notes about package compatibility

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We need to emphasise that the repmgr packages are only compatible
with packages based on the PGDG filesystem layout; 3rd party vendor
packages often put application and data directories elsewhere.
See e.g. GitHub #427.
This commit is contained in:
Ian Barwick
2018-05-01 11:08:59 +09:00
parent af0e141859
commit b1b5fe1193
3 changed files with 36 additions and 7 deletions
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17
doc/appendix-faq.sgml
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@@ -87,12 +87,27 @@
</para>
<para>
To minimize downtime during major upgrades, for more recent PostgreSQL
versions <ulink url="https://www.2ndquadrant.com/en/resources/pglogical/">pglogical</ulink>
versions (PostgreSQL 9.4 and later),
<ulink url="https://www.2ndquadrant.com/en/resources/pglogical/">pglogical</ulink>
can be used to set up a parallel cluster using the newer PostgreSQL version,
which can be kept in sync with the existing production cluster until the
new cluster is ready to be put into production.
</para>
</sect2>
<sect2 id="faq-libdir-repmgr-error">
<title>What does this error mean: <literal>ERROR: could not access file "$libdir/repmgr"</literal>?</title>
<para>
It means the &repmgr; extension code is not installed in the
PostgreSQL application directory. This typically happens when using PostgreSQL
packages provided by a third-party vendor, which often have different
filesystem layouts.
</para>
<para>
Either use PostgreSQL packages provided by the community or 2ndQuadrant; if this
is not possible, contact your vendor for assistance.
</para>
</sect2>
</sect1>
<sect1 id="faq-repmgr" xreflabel="repmgr">