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doc: add note about max_wal_senders in Pg12 and later

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Ian Barwick
2019-08-20 11:17:36 +09:00
parent 507b27c05d
commit 6e200d32a4
1 changed files with 11 additions and 1 deletions
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12
doc/configuration.xml
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@@ -148,9 +148,19 @@
instances in the replication cluster which may potentially become a primary server or
(in cascading replication) the upstream server of a standby.
</para>
<para>
<para>
PostgreSQL documentation: <ulink url="https://www.postgresql.org/docs/current/runtime-config-replication.html#GUC-MAX-WAL-SENDERS">max_wal_senders</ulink>.
</para>
<note>
<para>
From <productname>PostgreSQL 12</productname>, <option>max_wal_senders</option>
<emphasis>must</emphasis> be set to the same or a higher value as the primary node
(at the time the node was cloned), otherwise the standby will refuse
to start (unless <option>hot_standby</option> is set to <literal>off</literal>, which
will prevent the node from accepting queries).
</para>
</note>
</listitem>
</varlistentry>